C111123313121111121111331333133313331323232133113313231333131133131333131312121   >>    C11112331312111112111133133313331333132323213311331323133313113313133313131212   <<    C111123313121111121111331333133313331323232133113313231333131133131333131312123   >>      C111123313121111121111331333133313331323232133113313231333131133131333131312122   >>