Input TRS:
    1: f(a(),g(y),z) -> f(b(),g(y),g(y))
    2: f(b(),g(y),z) -> f(a(),y,z)
    3: a() -> b()
   e1: f(x(),y,z) ->= f(x(),y,g(z))	[relative]
Number of Rules: 3
Direct Mat3b ... failed.