C11112331333132311331333132313331333131133131133133313332312121   >>    C1111233133313231133133313231333133313113313113313331333231212   <<    C11112331333132311331333132313331333131133131133133313332312123   >>      C11112331333132311331333132313331333131133131133133313332312122   >>