Certificate for #16209 ⟨a, b | aab=ba, aaaa=aa⟩

Completion settings:

• Reduction order:
  • Right-to-left recursive path with deg(a) = 0; deg(b) = 1

Axiom: aab=ba.

Flip LHS and RHS.

Defines rule #2.

Axiom: aaaa=aa.

Defines rule #1.