Input TRS:
    1: g(x,x) -> g(a(),b())
    2: g(c(),g(c(),x)) -> g(e(),g(d(),x))
    3: g(d(),g(d(),x)) -> g(c(),g(e(),x))
    4: g(e(),g(e(),x)) -> g(d(),g(c(),x))
    5: f(g(x,y)) -> g(y,g(f(f(x)),a()))
Number of Rules: 5
Direct QKBOS(Sum) ... failed.