C1111233131211111211113313331323133313231333133312133313232233133322121   >>    C111123313121111121111331333132313331323133313331213331323223313332212   <<    C1111233131211111211113313331323133313231333133312133313232233133322123   >>      C1111233131211111211113313331323133313231333133312133313232233133322122   >>