uTake2
tt
cons
N
uLength
tt
s
length
L
and
tt
T
T
isNatIList
isNatList
isNat
tt
isNat
isNat
isNat
isNatList
isNatIList
tt
isNatIList
and
isNat
isNatIList
isNatList
tt
isNatList
and
isNat
isNatList
isNatList
and
isNat
isNatIList
zeros
cons
0
take
0
IL
uTake1
isNatIList
uTake1
tt
nil
take
s
M
cons
N
uTake2
and
isNat
and
isNat
isNatIList
length
cons
N
uLength
and
isNat
isNatList
2.2
NaTT
certifiable-1.6