C11112331333132311331333133313331323132313331211113313133313231232212231   >>    C1111233133313231133133313331333132313231333121111331313331323123221223   <<    C11112331333132311331333133313331323132313331211113313133313231232212233   >>      C11112331333132311331333133313331323132313331211113313133313231232212232   >>