C12313211232233312111111312111133133313331323133313331122332321133123312131   >>    C1231321123223331211111131211113313331333132313331333112233232113312331213   <<    C12313211232233312111111312111133133313331323133313331122332321133123312133   >>      C12313211232233312111111312111133133313331323133313331122332321133123312132   >>