active
zeros
mark
cons
0
zeros
active
tail
cons
X
XS
mark
XS
active
cons
X1
X2
cons
active
X1
X2
active
tail
X
tail
active
X
cons
mark
X1
X2
mark
cons
X1
X2
tail
mark
X
mark
tail
X
proper
zeros
ok
zeros
proper
cons
X1
X2
cons
proper
X1
proper
X2
proper
0
ok
0
proper
tail
X
tail
proper
X
cons
ok
X1
ok
X2
ok
cons
X1
X2
tail
ok
X
ok
tail
X
top
mark
X
top
proper
X
top
ok
X
top
active
X
active
1
zeros
0
mark
1
cons
2
0
0
tail
1
proper
1
ok
1
top
1
FULL
./TRS/TRCSR/Ex4_7_77_Bor03_C.trs