C12313211232233312111111312111133133313331323133323232322312211331   >>    C1231321123223331211111131211113313331333132313332323232231221133   <<    C12313211232233312111111312111133133313331323133323232322312211333   >>      C12313211232233312111111312111133133313331323133323232322312211332   >>