Environment: [x = {a}.y, y =({a}.{a, b}.nill + {b}.nill) ]
Initial Entities: {a, b}
Context: [({a,b}.{a}.{a,c}.x + {a,b}.{a}.{a}.nill)]
Reactions: ([{a,b}, {c}, {b}])

Target > Print,

Target (Limit: 7) > Print,

Target (Limit: 6) > Print,

Target (Limit: 5) > Print