C1111233131211111211113313331333133313211231211331323133313331323123231   >>    C111123313121111121111331333133313331321123121133132313331333132312323   <<    C1111233131211111211113313331333133313211231211331323133313331323123233   >>      C1111233131211111211113313331333133313211231211331323133313331323123232   >>