C111123313331323113313331333133313231323133312111112111133131133131223311   >>    C11112331333132311331333133313331323132313331211111211113313113313122331   <<    C111123313331323113313331333133313231323133312111112111133131133131223313   >>      C111123313331323113313331333133313231323133312111112111133131133131223312   >>