C11111211113313112113313331333133313331333132313331333133313121121211   >>    C1111121111331311211331333133313331333133313231333133313331312112121   <<    C11111211113313112113313331333133313331333132313331333133313121121213   >>      C11111211113313112113313331333133313331333132313331333133313121121212   >>