C11112331333132311331333133313231333131133131211113313233311311   >>    C1111233133313231133133313331323133313113313121111331323331131   <<    C11112331333132311331333133313231333131133131211113313233311313   >>      C11112331333132311331333133313231333131133131211113313233311312   >>