C11111211113313112113313331333133313331333121131211113313331323222323213211231   >>    C1111121111331311211331333133313331333133312113121111331333132322232321321123   <<    C11111211113313112113313331333133313331333121131211113313331323222323213211233   >>      C11111211113313112113313331333133313331333121131211113313331323222323213211232   >>