C1111233131211111211113313331333133313331333133313331333133313221211223131   >>    C111123313121111121111331333133313331333133313331333133313331322121122313   <<    C1111233131211111211113313331333133313331333133313331333133313221211223133   >>      C1111233131211111211113313331333133313331333133313331333133313221211223132   >>