from
X
cons
X
from
s
X
sel
0
cons
X
XS
X
sel
s
N
cons
X
XS
sel
N
XS
minus
X
0
0
minus
s
X
s
Y
minus
X
Y
quot
0
s
Y
0
quot
s
X
s
Y
s
quot
minus
X
Y
s
Y
zWquot
XS
nil
nil
zWquot
nil
XS
nil
zWquot
cons
X
XS
cons
Y
YS
cons
quot
X
Y
zWquot
XS
YS
from
1
cons
2
s
1
sel
2
0
0
minus
2
quot
2
zWquot
2
nil
0
INNERMOST
./TRS/nontermin/CSR/Ex4_7_37_Bor03.trs