sort
l
st
0
l
st
n
l
cond1
member
n
l
n
l
cond1
true
n
l
cons
n
st
s
n
l
cond1
false
n
l
cond2
gt
n
max
l
n
l
cond2
true
n
l
nil
cond2
false
n
l
st
s
n
l
member
n
nil
false
member
n
cons
m
l
or
equal
n
m
member
n
l
or
x
true
true
or
x
false
x
equal
0
0
true
equal
s
x
0
false
equal
0
s
y
false
equal
s
x
s
y
equal
x
y
gt
0
v
false
gt
s
u
0
true
gt
s
u
s
v
gt
u
v
max
nil
0
max
cons
u
l
if
gt
u
max
l
u
max
l
if
true
u
v
u
if
false
u
v
v
2.2
st
n
l
member
n
l
max
cons
u
l
if
gt
u
max
l
u
max
l
member
n
cons
m
l
equal
n
m
max
cons
u
l
max
l
sort
l
st
0
l
member
n
cons
m
l
or
equal
n
m
member
n
l
member
n
cons
m
l
member
n
l
max
cons
u
l
gt
u
max
l
cond1
true
n
l
st
s
n
l
gt
s
u
s
v
gt
u
v
cond1
false
n
l
max
l
cond1
false
n
l
gt
n
max
l
cond2
false
n
l
st
s
n
l
st
n
l
cond1
member
n
l
n
l
max
cons
u
l
max
l
cond1
false
n
l
cond2
gt
n
max
l
n
l
equal
s
x
s
y
equal
x
y
true
sort
l
st
0
l
false
cond1
false
n
l
cond2
gt
n
max
l
n
l
st
n
l
cond1
member
n
l
n
l
cond2
false
n
l
st
s
n
l
cond1
true
n
l
st
s
n
l
true
Failed!
NaTT
certifiable-1.6