active
zeros
mark
cons
0
zeros
active
U11
tt
V1
mark
U12
isNatList
V1
active
U12
tt
mark
tt
active
U21
tt
V1
mark
U22
isNat
V1
active
U22
tt
mark
tt
active
U31
tt
V
mark
U32
isNatList
V
active
U32
tt
mark
tt
active
U41
tt
V1
V2
mark
U42
isNat
V1
V2
active
U42
tt
V2
mark
U43
isNatIList
V2
active
U43
tt
mark
tt
active
U51
tt
V1
V2
mark
U52
isNat
V1
V2
active
U52
tt
V2
mark
U53
isNatList
V2
active
U53
tt
mark
tt
active
U61
tt
V1
V2
mark
U62
isNat
V1
V2
active
U62
tt
V2
mark
U63
isNatIList
V2
active
U63
tt
mark
tt
active
U71
tt
L
mark
s
length
L
active
U81
tt
mark
nil
active
U91
tt
IL
M
N
mark
cons
N
take
M
IL
active
and
tt
X
mark
X
active
isNat
0
mark
tt
active
isNat
length
V1
mark
U11
isNatIListKind
V1
V1
active
isNat
s
V1
mark
U21
isNatKind
V1
V1
active
isNatIList
V
mark
U31
isNatIListKind
V
V
active
isNatIList
zeros
mark
tt
active
isNatIList
cons
V1
V2
mark
U41
and
isNatKind
V1
isNatIListKind
V2
V1
V2
active
isNatIListKind
nil
mark
tt
active
isNatIListKind
zeros
mark
tt
active
isNatIListKind
cons
V1
V2
mark
and
isNatKind
V1
isNatIListKind
V2
active
isNatIListKind
take
V1
V2
mark
and
isNatKind
V1
isNatIListKind
V2
active
isNatKind
0
mark
tt
active
isNatKind
length
V1
mark
isNatIListKind
V1
active
isNatKind
s
V1
mark
isNatKind
V1
active
isNatList
nil
mark
tt
active
isNatList
cons
V1
V2
mark
U51
and
isNatKind
V1
isNatIListKind
V2
V1
V2
active
isNatList
take
V1
V2
mark
U61
and
isNatKind
V1
isNatIListKind
V2
V1
V2
active
length
nil
mark
0
active
length
cons
N
L
mark
U71
and
and
isNatList
L
isNatIListKind
L
and
isNat
N
isNatKind
N
L
active
take
0
IL
mark
U81
and
isNatIList
IL
isNatIListKind
IL
active
take
s
M
cons
N
IL
mark
U91
and
and
isNatIList
IL
isNatIListKind
IL
and
and
isNat
M
isNatKind
M
and
isNat
N
isNatKind
N
IL
M
N
active
cons
X1
X2
cons
active
X1
X2
active
U11
X1
X2
U11
active
X1
X2
active
U12
X
U12
active
X
active
U21
X1
X2
U21
active
X1
X2
active
U22
X
U22
active
X
active
U31
X1
X2
U31
active
X1
X2
active
U32
X
U32
active
X
active
U41
X1
X2
X3
U41
active
X1
X2
X3
active
U42
X1
X2
U42
active
X1
X2
active
U43
X
U43
active
X
active
U51
X1
X2
X3
U51
active
X1
X2
X3
active
U52
X1
X2
U52
active
X1
X2
active
U53
X
U53
active
X
active
U61
X1
X2
X3
U61
active
X1
X2
X3
active
U62
X1
X2
U62
active
X1
X2
active
U63
X
U63
active
X
active
U71
X1
X2
U71
active
X1
X2
active
s
X
s
active
X
active
length
X
length
active
X
active
U81
X
U81
active
X
active
U91
X1
X2
X3
X4
U91
active
X1
X2
X3
X4
active
take
X1
X2
take
active
X1
X2
active
take
X1
X2
take
X1
active
X2
active
and
X1
X2
and
active
X1
X2
cons
mark
X1
X2
mark
cons
X1
X2
U11
mark
X1
X2
mark
U11
X1
X2
U12
mark
X
mark
U12
X
U21
mark
X1
X2
mark
U21
X1
X2
U22
mark
X
mark
U22
X
U31
mark
X1
X2
mark
U31
X1
X2
U32
mark
X
mark
U32
X
U41
mark
X1
X2
X3
mark
U41
X1
X2
X3
U42
mark
X1
X2
mark
U42
X1
X2
U43
mark
X
mark
U43
X
U51
mark
X1
X2
X3
mark
U51
X1
X2
X3
U52
mark
X1
X2
mark
U52
X1
X2
U53
mark
X
mark
U53
X
U61
mark
X1
X2
X3
mark
U61
X1
X2
X3
U62
mark
X1
X2
mark
U62
X1
X2
U63
mark
X
mark
U63
X
U71
mark
X1
X2
mark
U71
X1
X2
s
mark
X
mark
s
X
length
mark
X
mark
length
X
U81
mark
X
mark
U81
X
U91
mark
X1
X2
X3
X4
mark
U91
X1
X2
X3
X4
take
mark
X1
X2
mark
take
X1
X2
take
X1
mark
X2
mark
take
X1
X2
and
mark
X1
X2
mark
and
X1
X2
proper
zeros
ok
zeros
proper
cons
X1
X2
cons
proper
X1
proper
X2
proper
0
ok
0
proper
U11
X1
X2
U11
proper
X1
proper
X2
proper
tt
ok
tt
proper
U12
X
U12
proper
X
proper
isNatList
X
isNatList
proper
X
proper
U21
X1
X2
U21
proper
X1
proper
X2
proper
U22
X
U22
proper
X
proper
isNat
X
isNat
proper
X
proper
U31
X1
X2
U31
proper
X1
proper
X2
proper
U32
X
U32
proper
X
proper
U41
X1
X2
X3
U41
proper
X1
proper
X2
proper
X3
proper
U42
X1
X2
U42
proper
X1
proper
X2
proper
U43
X
U43
proper
X
proper
isNatIList
X
isNatIList
proper
X
proper
U51
X1
X2
X3
U51
proper
X1
proper
X2
proper
X3
proper
U52
X1
X2
U52
proper
X1
proper
X2
proper
U53
X
U53
proper
X
proper
U61
X1
X2
X3
U61
proper
X1
proper
X2
proper
X3
proper
U62
X1
X2
U62
proper
X1
proper
X2
proper
U63
X
U63
proper
X
proper
U71
X1
X2
U71
proper
X1
proper
X2
proper
s
X
s
proper
X
proper
length
X
length
proper
X
proper
U81
X
U81
proper
X
proper
nil
ok
nil
proper
U91
X1
X2
X3
X4
U91
proper
X1
proper
X2
proper
X3
proper
X4
proper
take
X1
X2
take
proper
X1
proper
X2
proper
and
X1
X2
and
proper
X1
proper
X2
proper
isNatIListKind
X
isNatIListKind
proper
X
proper
isNatKind
X
isNatKind
proper
X
cons
ok
X1
ok
X2
ok
cons
X1
X2
U11
ok
X1
ok
X2
ok
U11
X1
X2
U12
ok
X
ok
U12
X
isNatList
ok
X
ok
isNatList
X
U21
ok
X1
ok
X2
ok
U21
X1
X2
U22
ok
X
ok
U22
X
isNat
ok
X
ok
isNat
X
U31
ok
X1
ok
X2
ok
U31
X1
X2
U32
ok
X
ok
U32
X
U41
ok
X1
ok
X2
ok
X3
ok
U41
X1
X2
X3
U42
ok
X1
ok
X2
ok
U42
X1
X2
U43
ok
X
ok
U43
X
isNatIList
ok
X
ok
isNatIList
X
U51
ok
X1
ok
X2
ok
X3
ok
U51
X1
X2
X3
U52
ok
X1
ok
X2
ok
U52
X1
X2
U53
ok
X
ok
U53
X
U61
ok
X1
ok
X2
ok
X3
ok
U61
X1
X2
X3
U62
ok
X1
ok
X2
ok
U62
X1
X2
U63
ok
X
ok
U63
X
U71
ok
X1
ok
X2
ok
U71
X1
X2
s
ok
X
ok
s
X
length
ok
X
ok
length
X
U81
ok
X
ok
U81
X
U91
ok
X1
ok
X2
ok
X3
ok
X4
ok
U91
X1
X2
X3
X4
take
ok
X1
ok
X2
ok
take
X1
X2
and
ok
X1
ok
X2
ok
and
X1
X2
isNatIListKind
ok
X
ok
isNatIListKind
X
isNatKind
ok
X
ok
isNatKind
X
top
mark
X
top
proper
X
top
ok
X
top
active
X
2.2
active
U11
tt
V1
isNatList
V1
active
take
s
M
cons
N
IL
and
isNat
N
isNatKind
N
U51
mark
X1
X2
X3
U51
X1
X2
X3
proper
U31
X1
X2
proper
X2
active
U62
tt
V2
U63
isNatIList
V2
active
U53
X
U53
active
X
active
take
s
M
cons
N
IL
and
isNat
M
isNatKind
M
proper
U91
X1
X2
X3
X4
proper
X4
active
isNatKind
s
V1
isNatKind
V1
U43
mark
X
U43
X
active
zeros
cons
0
zeros
U12
ok
X
U12
X
active
isNat
s
V1
U21
isNatKind
V1
V1
active
U61
X1
X2
X3
U61
active
X1
X2
X3
proper
take
X1
X2
proper
X1
active
take
X1
X2
active
X1
active
U51
X1
X2
X3
U51
active
X1
X2
X3
active
U41
X1
X2
X3
active
X1
proper
isNatIList
X
isNatIList
proper
X
active
U43
X
active
X
U32
mark
X
U32
X
U31
mark
X1
X2
U31
X1
X2
active
U51
tt
V1
V2
U52
isNat
V1
V2
U71
ok
X1
ok
X2
U71
X1
X2
U22
ok
X
U22
X
active
U42
tt
V2
U43
isNatIList
V2
proper
cons
X1
X2
proper
X2
U43
ok
X
U43
X
active
s
X
s
active
X
proper
U32
X
U32
proper
X
U91
ok
X1
ok
X2
ok
X3
ok
X4
U91
X1
X2
X3
X4
take
ok
X1
ok
X2
take
X1
X2
active
U91
X1
X2
X3
X4
active
X1
proper
isNatIListKind
X
isNatIListKind
proper
X
active
U41
tt
V1
V2
U42
isNat
V1
V2
proper
U63
X
U63
proper
X
proper
U52
X1
X2
proper
X2
s
mark
X
s
X
active
s
X
active
X
active
U22
X
U22
active
X
active
U62
X1
X2
active
X1
U41
mark
X1
X2
X3
U41
X1
X2
X3
active
isNatIList
V
isNatIListKind
V
active
U62
X1
X2
U62
active
X1
X2
proper
U11
X1
X2
U11
proper
X1
proper
X2
active
length
cons
N
L
isNatIListKind
L
isNatIList
ok
X
isNatIList
X
U51
ok
X1
ok
X2
ok
X3
U51
X1
X2
X3
proper
U61
X1
X2
X3
U61
proper
X1
proper
X2
proper
X3
active
length
cons
N
L
isNatKind
N
isNatIListKind
ok
X
isNatIListKind
X
active
isNatIListKind
take
V1
V2
isNatKind
V1
active
U52
X1
X2
active
X1
active
isNat
s
V1
isNatKind
V1
active
U42
X1
X2
U42
active
X1
X2
active
isNatIListKind
cons
V1
V2
and
isNatKind
V1
isNatIListKind
V2
U42
ok
X1
ok
X2
U42
X1
X2
active
U81
X
active
X
active
take
0
IL
U81
and
isNatIList
IL
isNatIListKind
IL
active
length
cons
N
L
and
isNat
N
isNatKind
N
top
ok
X
top
active
X
proper
U12
X
proper
X
proper
U41
X1
X2
X3
proper
X3
active
length
cons
N
L
and
and
isNatList
L
isNatIListKind
L
and
isNat
N
isNatKind
N
active
U31
tt
V
U32
isNatList
V
proper
U51
X1
X2
X3
U51
proper
X1
proper
X2
proper
X3
active
U41
X1
X2
X3
U41
active
X1
X2
X3
proper
cons
X1
X2
proper
X1
proper
isNatIList
X
proper
X
proper
U52
X1
X2
proper
X1
proper
U62
X1
X2
proper
X1
proper
length
X
proper
X
U91
mark
X1
X2
X3
X4
U91
X1
X2
X3
X4
length
mark
X
length
X
active
isNatList
cons
V1
V2
U51
and
isNatKind
V1
isNatIListKind
V2
V1
V2
active
isNatKind
length
V1
isNatIListKind
V1
active
isNatList
cons
V1
V2
isNatKind
V1
active
isNatIList
cons
V1
V2
U41
and
isNatKind
V1
isNatIListKind
V2
V1
V2
active
U42
tt
V2
isNatIList
V2
active
U42
X1
X2
active
X1
active
length
cons
N
L
isNatList
L
proper
U43
X
proper
X
proper
take
X1
X2
take
proper
X1
proper
X2
U12
mark
X
U12
X
active
take
0
IL
isNatIList
IL
U61
ok
X1
ok
X2
ok
X3
U61
X1
X2
X3
proper
U12
X
U12
proper
X
proper
U53
X
proper
X
active
cons
X1
X2
active
X1
active
U52
tt
V2
isNatList
V2
active
length
X
active
X
active
cons
X1
X2
cons
active
X1
X2
s
ok
X
s
X
U22
mark
X
U22
X
active
take
s
M
cons
N
IL
isNatIListKind
IL
U71
mark
X1
X2
U71
X1
X2
active
take
s
M
cons
N
IL
and
and
isNatIList
IL
isNatIListKind
IL
and
and
isNat
M
isNatKind
M
and
isNat
N
isNatKind
N
proper
s
X
proper
X
active
U51
X1
X2
X3
active
X1
active
U91
tt
IL
M
N
cons
N
take
M
IL
active
U71
tt
L
length
L
active
length
X
length
active
X
U52
ok
X1
ok
X2
U52
X1
X2
proper
isNat
X
isNat
proper
X
active
isNatList
cons
V1
V2
isNatIListKind
V2
proper
U22
X
proper
X
and
mark
X1
X2
and
X1
X2
active
isNatIList
cons
V1
V2
isNatIListKind
V2
active
take
s
M
cons
N
IL
and
isNatIList
IL
isNatIListKind
IL
active
length
cons
N
L
and
isNatList
L
isNatIListKind
L
proper
cons
X1
X2
cons
proper
X1
proper
X2
active
U52
tt
V2
U53
isNatList
V2
active
take
s
M
cons
N
IL
and
and
isNat
M
isNatKind
M
and
isNat
N
isNatKind
N
active
isNatIList
V
U31
isNatIListKind
V
V
U11
mark
X1
X2
U11
X1
X2
U21
ok
X1
ok
X2
U21
X1
X2
proper
U62
X1
X2
U62
proper
X1
proper
X2
active
isNat
length
V1
U11
isNatIListKind
V1
V1
proper
U91
X1
X2
X3
X4
U91
proper
X1
proper
X2
proper
X3
proper
X4
proper
U22
X
U22
proper
X
U63
mark
X
U63
X
active
U71
tt
L
s
length
L
active
U91
X1
X2
X3
X4
U91
active
X1
X2
X3
X4
U62
ok
X1
ok
X2
U62
X1
X2
proper
U81
X
U81
proper
X
proper
U41
X1
X2
X3
proper
X1
active
take
0
IL
and
isNatIList
IL
isNatIListKind
IL
proper
U62
X1
X2
proper
X2
proper
U41
X1
X2
X3
U41
proper
X1
proper
X2
proper
X3
top
mark
X
proper
X
proper
isNatKind
X
isNatKind
proper
X
proper
U21
X1
X2
proper
X1
proper
isNatIListKind
X
proper
X
active
take
s
M
cons
N
IL
isNatKind
N
active
isNatIListKind
cons
V1
V2
isNatKind
V1
active
take
X1
X2
take
X1
active
X2
U63
ok
X
U63
X
active
U52
X1
X2
U52
active
X1
X2
active
U63
X
U63
active
X
active
isNatList
take
V1
V2
U61
and
isNatKind
V1
isNatIListKind
V2
V1
V2
active
isNatList
cons
V1
V2
and
isNatKind
V1
isNatIListKind
V2
and
ok
X1
ok
X2
and
X1
X2
active
U61
X1
X2
X3
active
X1
active
and
X1
X2
and
active
X1
X2
proper
and
X1
X2
and
proper
X1
proper
X2
proper
U53
X
U53
proper
X
proper
U91
X1
X2
X3
X4
proper
X2
active
U32
X
U32
active
X
proper
U63
X
proper
X
U32
ok
X
U32
X
isNatKind
ok
X
isNatKind
X
proper
and
X1
X2
proper
X1
active
U12
X
active
X
proper
s
X
s
proper
X
proper
U91
X1
X2
X3
X4
proper
X3
active
take
X1
X2
take
active
X1
X2
proper
U31
X1
X2
proper
X1
U21
mark
X1
X2
U21
X1
X2
active
isNatIList
cons
V1
V2
and
isNatKind
V1
isNatIListKind
V2
proper
isNatList
X
proper
X
proper
U21
X1
X2
proper
X2
U53
ok
X
U53
X
active
U43
X
U43
active
X
proper
U42
X1
X2
U42
proper
X1
proper
X2
active
U32
X
active
X
proper
U11
X1
X2
proper
X1
cons
mark
X1
X2
cons
X1
X2
active
take
s
M
cons
N
IL
isNat
M
active
take
s
M
cons
N
IL
isNat
N
proper
U51
X1
X2
X3
proper
X2
top
ok
X
active
X
U41
ok
X1
ok
X2
ok
X3
U41
X1
X2
X3
proper
U42
X1
X2
proper
X2
proper
U31
X1
X2
U31
proper
X1
proper
X2
active
U63
X
active
X
active
U61
tt
V1
V2
isNat
V1
proper
U71
X1
X2
proper
X2
proper
U61
X1
X2
X3
proper
X3
proper
U43
X
U43
proper
X
isNat
ok
X
isNat
X
active
isNatIListKind
take
V1
V2
and
isNatKind
V1
isNatIListKind
V2
active
length
cons
N
L
isNat
N
active
take
X1
X2
active
X2
U31
ok
X1
ok
X2
U31
X1
X2
proper
take
X1
X2
proper
X2
active
isNatList
take
V1
V2
isNatKind
V1
U53
mark
X
U53
X
proper
U11
X1
X2
proper
X2
active
U11
X1
X2
U11
active
X1
X2
active
isNatList
take
V1
V2
isNatIListKind
V2
U42
mark
X1
X2
U42
X1
X2
top
mark
X
top
proper
X
active
U61
tt
V1
V2
U62
isNat
V1
V2
proper
U21
X1
X2
U21
proper
X1
proper
X2
proper
U51
X1
X2
X3
proper
X1
length
ok
X
length
X
active
isNat
length
V1
isNatIListKind
V1
active
and
X1
X2
active
X1
proper
U91
X1
X2
X3
X4
proper
X1
U62
mark
X1
X2
U62
X1
X2
active
U21
tt
V1
isNat
V1
active
isNatList
take
V1
V2
and
isNatKind
V1
isNatIListKind
V2
U52
mark
X1
X2
U52
X1
X2
proper
U81
X
proper
X
active
U51
tt
V1
V2
isNat
V1
active
take
s
M
cons
N
IL
isNatKind
M
cons
ok
X1
ok
X2
cons
X1
X2
active
U21
X1
X2
U21
active
X1
X2
U61
mark
X1
X2
X3
U61
X1
X2
X3
proper
U51
X1
X2
X3
proper
X3
active
U31
tt
V
isNatList
V
isNatList
ok
X
isNatList
X
proper
U41
X1
X2
X3
proper
X2
active
U53
X
active
X
proper
isNatList
X
isNatList
proper
X
active
U31
X1
X2
active
X1
take
mark
X1
X2
take
X1
X2
proper
U61
X1
X2
X3
proper
X1
proper
U42
X1
X2
proper
X1
active
take
s
M
cons
N
IL
U91
and
and
isNatIList
IL
isNatIListKind
IL
and
and
isNat
M
isNatKind
M
and
isNat
N
isNatKind
N
IL
M
N
active
U11
tt
V1
U12
isNatList
V1
proper
U71
X1
X2
U71
proper
X1
proper
X2
active
U22
X
active
X
active
length
cons
N
L
U71
and
and
isNatList
L
isNatIListKind
L
and
isNat
N
isNatKind
N
L
active
U81
X
U81
active
X
active
U21
tt
V1
U22
isNat
V1
active
U41
tt
V1
V2
isNat
V1
active
U91
tt
IL
M
N
take
M
IL
proper
U61
X1
X2
X3
proper
X2
active
isNatIListKind
cons
V1
V2
isNatIListKind
V2
U81
ok
X
U81
X
active
isNatIListKind
take
V1
V2
isNatIListKind
V2
active
take
0
IL
isNatIListKind
IL
active
isNatIList
cons
V1
V2
isNatKind
V1
proper
U71
X1
X2
proper
X1
proper
and
X1
X2
proper
X2
proper
isNatKind
X
proper
X
U11
ok
X1
ok
X2
U11
X1
X2
active
U31
X1
X2
U31
active
X1
X2
proper
U52
X1
X2
U52
proper
X1
proper
X2
proper
isNat
X
proper
X
take
X1
mark
X2
take
X1
X2
active
U71
X1
X2
U71
active
X1
X2
proper
U32
X
proper
X
active
U12
X
U12
active
X
U81
mark
X
U81
X
active
U71
X1
X2
active
X1
active
take
s
M
cons
N
IL
isNatIList
IL
proper
length
X
length
proper
X
active
U11
X1
X2
active
X1
active
U21
X1
X2
active
X1
active
U62
tt
V2
isNatIList
V2
true
top
mark
X
top
proper
X
top
ok
X
top
active
X
true
Failed!
NaTT
certifiable-1.6