C1111233131211111211113313331333133313211231211331323133313331312122321331   >>    C111123313121111121111331333133313331321123121133132313331333131212232133   <<    C1111233131211111211113313331333133313211231211331323133313331312122321333   >>      C1111233131211111211113313331333133313211231211331323133313331312122321332   >>