C1111133313331323223313331333133313113313231333131211111312233231   >>    C111113331333132322331333133313331311331323133313121111131223323   <<    C1111133313331323223313331333133313113313231333131211111312233233   >>      C1111133313331323223313331333133313113313231333131211111312233232   >>