C12313211232233312111111312111133133313331333132232233122322221131222321   >>    C1231321123223331211111131211113313331333133313223223312232222113122232   <<    C12313211232233312111111312111133133313331333132232233122322221131222323   >>      C12313211232233312111111312111133133313331333132232233122322221131222322   >>