C1111133313331323223313331333133313331323131211113312111133222233112311   >>    C111113331333132322331333133313331333132313121111331211113322223311231   <<    C1111133313331323223313331333133313331323131211113312111133222233112313   >>      C1111133313331323223313331333133313331323131211113312111133222233112312   >>