zeros
cons
0
n__zeros
and
tt
X
activate
X
length
nil
0
length
cons
N
L
s
length
activate
L
zeros
n__zeros
activate
n__zeros
zeros
activate
X
X
2.2
activate
n__zeros
zeros
length
cons
N
L
length
activate
L
and
tt
X
activate
X
length
cons
N
L
activate
L
true
and
tt
X
activate
X
false
length
cons
N
L
length
activate
L
true
Failed!
NaTT
certifiable-1.6