U11
tt
N
X
XS
U12
splitAt
activate
N
activate
XS
activate
X
U12
pair
YS
ZS
X
pair
cons
activate
X
YS
ZS
afterNth
N
XS
snd
splitAt
N
XS
and
tt
X
activate
X
fst
pair
X
Y
X
head
cons
N
XS
N
natsFrom
N
cons
N
n__natsFrom
s
N
sel
N
XS
head
afterNth
N
XS
snd
pair
X
Y
Y
splitAt
0
XS
pair
nil
XS
splitAt
s
N
cons
X
XS
U11
tt
N
X
activate
XS
tail
cons
N
XS
activate
XS
take
N
XS
fst
splitAt
N
XS
natsFrom
X
n__natsFrom
X
activate
n__natsFrom
X
natsFrom
X
activate
X
X
2.2
take
N
XS
fst
splitAt
N
XS
tail
cons
N
XS
activate
XS
U11
tt
N
X
XS
activate
X
U11
tt
N
X
XS
U12
splitAt
activate
N
activate
XS
activate
X
U11
tt
N
X
XS
activate
N
U11
tt
N
X
XS
activate
XS
sel
N
XS
head
afterNth
N
XS
afterNth
N
XS
snd
splitAt
N
XS
U11
tt
N
X
XS
splitAt
activate
N
activate
XS
splitAt
s
N
cons
X
XS
activate
XS
and
tt
X
activate
X
activate
n__natsFrom
X
natsFrom
X
take
N
XS
splitAt
N
XS
U12
pair
YS
ZS
X
activate
X
afterNth
N
XS
splitAt
N
XS
sel
N
XS
afterNth
N
XS
splitAt
s
N
cons
X
XS
U11
tt
N
X
activate
XS
true
sel
N
XS
head
afterNth
N
XS
false
sel
N
XS
afterNth
N
XS
false
afterNth
N
XS
splitAt
N
XS
false
take
N
XS
splitAt
N
XS
false
and
tt
X
activate
X
false
tail
cons
N
XS
activate
XS
false
splitAt
s
N
cons
X
XS
U11
tt
N
X
activate
XS
U11
tt
N
X
XS
splitAt
activate
N
activate
XS
true
U11
4
0
s
1
1
23598
take
2
0
activate
1
1
11798
take
2
0
and
2
0
pair
2
0
fst
1
0
activate
1
0
natsFrom
1
29019
head
1
0
splitAt
2
0
fst
1
0
U12
2
0
n__natsFrom
1
17221
U12
2
0
tail
1
0
0
0
0
sel
2
0
sel
2
0
afterNth
2
0
nil
0
0
tail
1
0
splitAt
2
1
2
0
afterNth
2
0
U11
4
1
2
4
23596
head
1
0
snd
1
0
cons
2
2
11798
natsFrom
1
0
snd
1
0
tt
0
1
and
2
0
activate
n__natsFrom
X
natsFrom
X
activate
X
X
natsFrom
N
cons
N
n__natsFrom
s
N
natsFrom
X
n__natsFrom
X
U11
tt
N
X
XS
U12
splitAt
activate
N
activate
XS
activate
X
false
U12
pair
YS
ZS
X
activate
X
false
U11
tt
N
X
XS
activate
N
false
U11
tt
N
X
XS
activate
XS
false
U11
tt
N
X
XS
activate
X
false
splitAt
s
N
cons
X
XS
activate
XS
false
activate
n__natsFrom
X
natsFrom
X
false
afterNth
N
XS
snd
splitAt
N
XS
false
take
N
XS
fst
splitAt
N
XS
false
NaTT
certifiable-1.6