C12313211232233312111111312111133133313331323133311233111322312111   >>    C1231321123223331211111131211113313331333132313331123311132231211   <<    C12313211232233312111111312111133133313331323133311233111322312113   >>      C12313211232233312111111312111133133313331323133311233111322312112   >>