SUCCESS
1.76 (total time)

COMPLETED TRS
i(i(i(x))) -> i(x)
i(e) -> e
i(f(x, y)) -> f(i(y), i(x))
f(i(x), x) -> e
f(e, x) -> i(i(x))
f(f(x, i(y)), y) -> x
f(f(x, y), i(y)) -> x
f(x, i(i(y))) -> f(x, y)
f(x, e) -> x
f(x, f(y, z)) -> f(f(x, y), z)