C111123313331323113313331323133313331311331311331323331323223313231111   >>    C11112331333132311331333132313331333131133131133132333132322331323111   <<    C111123313331323113313331323133313331311331311331323331323223313231113   >>      C111123313331323113313331323133313331311331311331323331323223313231112   >>