admit
x
nil
nil
admit
x
.
u
.
v
.
w
z
cond
=
sum
x
u
v
w
.
u
.
v
.
w
admit
carry
x
u
v
z
cond
true
y
y
2.2
admit
x
.
u
.
v
.
w
z
admit
carry
x
u
v
z
admit
x
.
u
.
v
.
w
z
cond
=
sum
x
u
v
w
.
u
.
v
.
w
admit
carry
x
u
v
z
true
admit
x
.
u
.
v
.
w
z
admit
carry
x
u
v
z
true
admit
2
0
w
0
1
true
0
0
sum
3
0
cond
2
0
=
2
0
nil
0
0
.
2
2
23676
admit
2
1
2
0
carry
3
1
cond
2
0
admit
x
.
u
.
v
.
w
z
cond
=
sum
x
u
v
w
.
u
.
v
.
w
admit
carry
x
u
v
z
false
NaTT
certifiable-1.6