C12313211232233312111111312111133133313331323133323132213233223321221   >>    C1231321123223331211111131211113313331333132313332313221323322332122   <<    C12313211232233312111111312111133133313331323133323132213233223321223   >>      C12313211232233312111111312111133133313331323133323132213233223321222   >>