C12313211232233312111111312111133133313331333132232233122322123332321   >>    C1231321123223331211111131211113313331333133313223223312232212333232   <<    C12313211232233312111111312111133133313331333132232233122322123332323   >>      C12313211232233312111111312111133133313331333132232233122322123332322   >>