C12313211232233312111111312111133133313331323133313332322321122131121311   >>    C1231321123223331211111131211113313331333132313331333232232112213112131   <<    C12313211232233312111111312111133133313331323133313332322321122131121313   >>      C12313211232233312111111312111133133313331323133313332322321122131121312   >>