C1111233131211111211113313331333133313232313331333133313132111221   >>    C111123313121111121111331333133313331323231333133313331313211122   <<    C1111233131211111211113313331333133313232313331333133313132111223   >>      C1111233131211111211113313331333133313232313331333133313132111222   >>