C11111211113313112113313331333133313331333132313331333132313223313121   >>    C1111121111331311211331333133313331333133313231333133313231322331312   <<    C11111211113313112113313331333133313331333132313331333132313223313123   >>      C11111211113313112113313331333133313331333132313331333132313223313122   >>