C1111233131211111211113313331333133313232321333131333131133131211121   >>    C111123313121111121111331333133313331323232133313133313113313121112   <<    C1111233131211111211113313331333133313232321333131333131133131211123   >>      C1111233131211111211113313331333133313232321333131333131133131211122   >>