C111123313331323113313331333133313331323123231333133313231323133313232212111   >>    C11112331333132311331333133313331333132312323133313331323132313331323221211   <<    C111123313331323113313331333133313331323123231333133313231323133313232212113   >>      C111123313331323113313331333133313331323123231333133313231323133313232212112   >>