C1111233131211111211113313331323133313231333133313221333131212231   >>    C111123313121111121111331333132313331323133313331322133313121223   <<    C1111233131211111211113313331323133313231333133313221333131212233   >>      C1111233131211111211113313331323133313231333133313221333131212232   >>