C313212111133131211331333133313331211113313113321133133313223313232211   >>    C31321211113313121133133313331333121111331311332113313331322331323221   <<    C313212111133131211331333133313331211113313113321133133313223313232213   >>      C313212111133131211331333133313331211113313113321133133313223313232212   >>