from
X
cons
X
n__from
s
X
first
0
Z
nil
first
s
X
cons
Y
Z
cons
Y
n__first
X
activate
Z
sel
0
cons
X
Z
X
sel
s
X
cons
Y
Z
sel
X
activate
Z
from
X
n__from
X
first
X1
X2
n__first
X1
X2
activate
n__from
X
from
X
activate
n__first
X1
X2
first
X1
X2
activate
X
X
from
1
cons
2
n__from
1
s
1
first
2
0
0
nil
0
n__first
2
activate
1
sel
2
INNERMOST
./TRS/TRCSR/Ex1_Luc02b_Z.trs