sel
s
X
cons
Y
Z
sel
X
activate
Z
sel
0
cons
X
Z
X
first
0
Z
nil
first
s
X
cons
Y
Z
cons
Y
n__first
X
activate
Z
from
X
cons
X
n__from
s
X
sel1
s
X
cons
Y
Z
sel1
X
activate
Z
sel1
0
cons
X
Z
quote
X
first1
0
Z
nil1
first1
s
X
cons
Y
Z
cons1
quote
Y
first1
X
activate
Z
quote
n__0
01
quote1
n__cons
X
Z
cons1
quote
activate
X
quote1
activate
Z
quote1
n__nil
nil1
quote
n__s
X
s1
quote
activate
X
quote
n__sel
X
Z
sel1
activate
X
activate
Z
quote1
n__first
X
Z
first1
activate
X
activate
Z
unquote
01
0
unquote
s1
X
s
unquote
X
unquote1
nil1
nil
unquote1
cons1
X
Z
fcons
unquote
X
unquote1
Z
fcons
X
Z
cons
X
Z
first
X1
X2
n__first
X1
X2
from
X
n__from
X
0
n__0
cons
X1
X2
n__cons
X1
X2
nil
n__nil
s
X
n__s
X
sel
X1
X2
n__sel
X1
X2
activate
n__first
X1
X2
first
X1
X2
activate
n__from
X
from
X
activate
n__0
0
activate
n__cons
X1
X2
cons
X1
X2
activate
n__nil
nil
activate
n__s
X
s
X
activate
n__sel
X1
X2
sel
X1
X2
activate
X
X
2.2
sel1
s
X
cons
Y
Z
sel1
X
activate
Z
unquote1
cons1
X
Z
unquote
X
quote1
n__first
X
Z
first1
activate
X
activate
Z
quote1
n__first
X
Z
activate
Z
first
s
X
cons
Y
Z
cons
Y
n__first
X
activate
Z
first1
s
X
cons
Y
Z
quote
Y
unquote1
nil1
nil
activate
n__cons
X1
X2
cons
X1
X2
quote1
n__cons
X
Z
quote
activate
X
quote1
n__cons
X
Z
quote1
activate
Z
activate
n__sel
X1
X2
sel
X1
X2
activate
n__first
X1
X2
first
X1
X2
quote1
n__cons
X
Z
activate
Z
unquote
01
0
quote
n__sel
X
Z
sel1
activate
X
activate
Z
unquote1
cons1
X
Z
unquote1
Z
unquote
s1
X
s
unquote
X
activate
n__s
X
s
X
first1
s
X
cons
Y
Z
first1
X
activate
Z
first
s
X
cons
Y
Z
activate
Z
quote1
n__cons
X
Z
activate
X
sel
s
X
cons
Y
Z
sel
X
activate
Z
quote
n__s
X
activate
X
unquote1
cons1
X
Z
fcons
unquote
X
unquote1
Z
from
X
s
X
sel
s
X
cons
Y
Z
activate
Z
activate
n__nil
nil
activate
n__0
0
first
0
Z
nil
sel1
0
cons
X
Z
quote
X
unquote
s1
X
unquote
X
quote1
n__first
X
Z
activate
X
from
X
cons
X
n__from
s
X
quote
n__sel
X
Z
activate
Z
sel1
s
X
cons
Y
Z
activate
Z
activate
n__from
X
from
X
first1
s
X
cons
Y
Z
activate
Z
quote
n__sel
X
Z
activate
X
quote
n__s
X
quote
activate
X
fcons
X
Z
cons
X
Z
true
unquote1
cons1
X
Z
unquote1
Z
true
0
0
0
01
0
0
cons
2
0
s
1
0
unquote1
1
0
quote1
1
0
n__first
2
0
activate
1
0
unquote1
1
1
0
n__from
1
0
activate
1
0
fcons
2
0
first1
2
0
n__nil
0
0
n__s
1
0
cons1
2
2
1
0
0
0
sel
2
0
sel
2
0
from
1
0
s
1
0
n__cons
2
0
first
2
0
nil
0
0
sel1
2
0
quote1
1
0
n__sel
2
0
nil
0
0
nil1
0
0
first
2
0
n__0
0
0
first1
2
0
unquote
1
0
from
1
0
quote
1
0
cons
2
0
quote
1
0
sel1
2
0
s1
1
0
unquote
1
0
fcons
2
0
quote1
n__cons
X
Z
quote1
activate
Z
true
Failed!
NaTT
certifiable-1.6