C111123313331323113313331313331333132313331322121111331323231323131123313111   >>    C11112331333132311331333131333133313231333132212111133132323132313112331311   <<    C111123313331323113313331313331333132313331322121111331323231323131123313113   >>      C111123313331323113313331313331333132313331322121111331323231323131123313112   >>