C11111211113313112113313331333133313331333132313231333133313223331211   >>    C1111121111331311211331333133313331333133313231323133313331322333121   <<    C11111211113313112113313331333133313331333132313231333133313223331213   >>      C11111211113313112113313331333133313331333132313231333133313223331212   >>