Certificate for #15993 ⟨a, b | aaa=ab, aabb=aa

Completion settings:

[1] ab=aaa

Axiom: aaa=ab.

Flip LHS and RHS.

Defines rule #2.

Referenced by [2].

[2] aaaaaa=aa

Axiom: aabb=aa.

Reduce LHS:

[1]a(ab)b
[1]aaa(ab)
aaaaaa

Defines rule #1.