C111123313331323113313331333133313331323123231333132313331312121   >>    C11112331333132311331333133313331333132312323133313231333131212   <<    C111123313331323113313331333133313331323123231333132313331312123   >>      C111123313331323113313331333133313331323123231333132313331312122   >>