C111123313331323113313331333133313331323123231333131232313221211   >>    C11112331333132311331333133313331333132312323133313123231322121   <<    C111123313331323113313331333133313331323123231333131232313221213   >>      C111123313331323113313331333133313331323123231333131232313221212   >>