/home/nowonder/forschung/aprove/TPDB05/TRS/nontermin/CSR/Ex2_Luc03b.trs

The program

(VAR X Y Z)

(RULES 
fst(0,Z) -> nil
fst(s(X),cons(Y,Z)) -> cons(Y,fst(X,Z))
from(X) -> cons(X,from(s(X)))
add(0,X) -> X
add(s(X),Y) -> s(add(X,Y))
len(nil) -> 0
len(cons(X,Z)) -> s(len(Z))
)

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