C11112331312111112111133133313331333132313233313113313132233132311231   >>    C1111233131211111211113313331333133313231323331311331313223313231123   <<    C11112331312111112111133133313331333132313233313113313132233132311233   >>      C11112331312111112111133133313331333132313233313113313132233132311232   >>