C12313211232233312111111312111133133313331323133323132323322123313221   >>    C1231321123223331211111131211113313331333132313332313232332212331322   <<    C12313211232233312111111312111133133313331323133323132323322123313223   >>      C12313211232233312111111312111133133313331323133323132323322123313222   >>