C111112111133131121133133313331333133313331322121111132313232211   >>    C11111211113313112113313331333133313331333132212111113231323221   <<    C111112111133131121133133313331333133313331322121111132313232213   >>      C111112111133131121133133313331333133313331322121111132313232212   >>