C12313211232233312111111312111133133313331333132232233122323132321   >>    C1231321123223331211111131211113313331333133313223223312232313232   <<    C12313211232233312111111312111133133313331333132232233122323132323   >>      C12313211232233312111111312111133133313331333132232233122323132322   >>