ref: 4c879fbc5fa9a9796fecd144fed13b12c19384fd dir: /examples/accept.ref/
A 3 B 3 C 3 ABC 3 B 3 C 3 D 3 BCD 3 A 3 B 3 C 3 ABC 3 B 3 C 3 D 3 BCD 3 A 3 B 3 C 3 ABC 3 B 3 C 3 D 3 BCD 3 A 3 B 3 C 3 ABC 3 B 3 C 3 D 3 BCD 3