C12313211232233312111111312111133133313331323133313332322321132221111   >>    C1231321123223331211111131211113313331333132313331333232232113222111   <<    C12313211232233312111111312111133133313331323133313332322321132221113   >>      C12313211232233312111111312111133133313331323133313332322321132221112   >>