C12313211232233312111111312111133133313331333132232233122322231123221   >>    C1231321123223331211111131211113313331333133313223223312232223112322   <<    C12313211232233312111111312111133133313331333132232233122322231123223   >>      C12313211232233312111111312111133133313331333132232233122322231123222   >>