C11112331333132311331333133313331333132313233313233313231322331211   >>    C1111233133313231133133313331333133313231323331323331323132233121   <<    C11112331333132311331333133313331333132313233313233313231322331213   >>      C11112331333132311331333133313331333132313233313233313231322331212   >>