C1111233131211111211113313331333133313331122233133313132313123223331   >>    C111123313121111121111331333133313331333112223313331313231312322333   <<    C1111233131211111211113313331333133313331122233133313132313123223333   >>      C1111233131211111211113313331333133313331122233133313132313123223332   >>