0 QTRS
a(lambda(x), y) → lambda(a(x, p(1, a(y, t)))) a(p(x, y), z) → p(a(x, z), a(y, z)) a(a(x, y), z) → a(x, a(y, z)) lambda(x) → x a(x, y) → x a(x, y) → y p(x, y) → x p(x, y) → y