C1111233131211111211113313331333133313331122212111112111113232113313221221   >>    C111123313121111121111331333133313331333112221211111211111323211331322122   <<    C1111233131211111211113313331333133313331122212111112111113232113313221223   >>      C1111233131211111211113313331333133313331122212111112111113232113313221222   >>