C12313211232233312111111312111133133313331323133323132213231223312211   >>    C1231321123223331211111131211113313331333132313332313221323122331221   <<    C12313211232233312111111312111133133313331323133323132213231223312213   >>      C12313211232233312111111312111133133313331323133323132213231223312212   >>