C1111133313331323223313331333133313113313231333132212111133121111   >>    C111113331333132322331333133313331311331323133313221211113312111   <<    C1111133313331323223313331333133313113313231333132212111133121113   >>      C1111133313331323223313331333133313113313231333132212111133121112   >>