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
U11
4
tt
0
U12
2
splitAt
2
activate
1
pair
2
cons
2
afterNth
2
snd
1
and
2
fst
1
head
1
natsFrom
1
n__natsFrom
1
s
1
sel
2
0
0
nil
0
tail
1
take
2
INNERMOST
./TRS/TRCSR/LISTUTILITIES_nosorts_Z.trs