Certificate for #12170 ⟨a, b | aaaa=ab, aabb=a

Completion settings:

[1] ab=aaaa

Axiom: aaaa=ab.

Flip LHS and RHS.

Defines rule #2.

Referenced by [2].

[2] aaaaaaaa=a

Axiom: aabb=a.

Reduce LHS:

[1]a(ab)b
[1]aaaa(ab)
aaaaaaaa

Defines rule #1.