active
zeros
mark
cons
0
zeros
active
and
tt
X
mark
X
active
length
nil
mark
0
active
length
cons
N
L
mark
s
length
L
active
cons
X1
X2
cons
active
X1
X2
active
and
X1
X2
and
active
X1
X2
active
length
X
length
active
X
active
s
X
s
active
X
cons
mark
X1
X2
mark
cons
X1
X2
and
mark
X1
X2
mark
and
X1
X2
length
mark
X
mark
length
X
s
mark
X
mark
s
X
proper
zeros
ok
zeros
proper
cons
X1
X2
cons
proper
X1
proper
X2
proper
0
ok
0
proper
and
X1
X2
and
proper
X1
proper
X2
proper
tt
ok
tt
proper
length
X
length
proper
X
proper
nil
ok
nil
proper
s
X
s
proper
X
cons
ok
X1
ok
X2
ok
cons
X1
X2
and
ok
X1
ok
X2
ok
and
X1
X2
length
ok
X
ok
length
X
s
ok
X
ok
s
X
top
mark
X
top
proper
X
top
ok
X
top
active
X
active
1
zeros
0
mark
1
cons
2
0
0
and
2
tt
0
length
1
nil
0
s
1
proper
1
ok
1
top
1
INNERMOST
./TRS/TRCSR/inn/LengthOfFiniteLists_nosorts_C.trs