C111123313331323113313331333133313231333132311312111133131133132313233233311   >>    C11112331333132311331333133313331323133313231131211113313113313231323323331   <<    C111123313331323113313331333133313231333132311312111133131133132313233233313   >>      C111123313331323113313331333133313231333132311312111133131133132313233233312   >>