C11111211113313112113313331333133313331333121131211113313331323222323213211   >>    C1111121111331311211331333133313331333133312113121111331333132322232321321   <<    C11111211113313112113313331333133313331333121131211113313331323222323213213   >>      C11111211113313112113313331333133313331333121131211113313331323222323213212   >>