C12313211232233312111111312111133133313331323133323132323322232321322121   >>    C1231321123223331211111131211113313331333132313332313232332223232132212   <<    C12313211232233312111111312111133133313331323133323132323322232321322123   >>      C12313211232233312111111312111133133313331323133323132323322232321322122   >>