C11112331333132311331333132313331333131133131133133313233121212311   >>    C1111233133313231133133313231333133313113313113313331323312121231   <<    C11112331333132311331333132313331333131133131133133313233121212313   >>      C11112331333132311331333132313331333131133131133133313233121212312   >>