C11111211113313112113313331333133313331333132313331333133313331312331121211   >>    C1111121111331311211331333133313331333133313231333133313331333131233112121   <<    C11111211113313112113313331333133313331333132313331333133313331312331121213   >>      C11111211113313112113313331333133313331333132313331333133313331312331121212   >>