C111123313331323113313331333133313331323112133313331333132313233313331312121   >>    C11112331333132311331333133313331333132311213331333133313231323331333131212   <<    C111123313331323113313331333133313331323112133313331333132313233313331312123   >>      C111123313331323113313331333133313331323112133313331333132313233313331312122   >>