C12313211232233312111111312111133133313331323133323232322133313121   >>    C1231321123223331211111131211113313331333132313332323232213331312   <<    C12313211232233312111111312111133133313331323133323232322133313123   >>      C12313211232233312111111312111133133313331323133323232322133313122   >>