active
f
X
X
mark
f
a
b
active
b
mark
a
active
f
X1
X2
f
active
X1
X2
f
mark
X1
X2
mark
f
X1
X2
proper
f
X1
X2
f
proper
X1
proper
X2
proper
a
ok
a
proper
b
ok
b
f
ok
X1
ok
X2
ok
f
X1
X2
top
mark
X
top
proper
X
top
ok
X
top
active
X
2.2
top
mark
X
proper
X
proper
f
X1
X2
proper
X1
active
f
X1
X2
active
X1
f
ok
X1
ok
X2
f
X1
X2
f
mark
X1
X2
f
X1
X2
proper
f
X1
X2
proper
X2
active
f
X
X
f
a
b
proper
f
X1
X2
f
proper
X1
proper
X2
top
ok
X
top
active
X
top
mark
X
top
proper
X
active
f
X1
X2
f
active
X1
X2
top
ok
X
active
X
true
top
mark
X
top
proper
X
top
ok
X
top
active
X
true
Failed!
NaTT
certifiable-1.6