Input TRS:
    1: |2nd|(cons(X)) -> head(XS)
    2: sel(s(N),cons(X)) -> sel(N,XS)
    3: from(X) -> cons(X)
    4: head(cons(X)) -> X
    5: take(|0|(),XS) -> nil()
    6: take(s(N),cons(X)) -> cons(X)
    7: sel(|0|(),cons(X)) -> X
Extra variable in rule 2.
NO