C1111233131211111211113313331333133313331333132213331333133313231311211312121   >>    C111123313121111121111331333133313331333133313221333133313331323131121131212   <<    C1111233131211111211113313331333133313331333132213331333133313231311211312123   >>      C1111233131211111211113313331333133313331333132213331333133313231311211312122   >>