C111112111133131121133133313331333131333132322331333121133112121   >>    C11111211113313112113313331333133313133313232233133312113311212   <<    C111112111133131121133133313331333131333132322331333121133112123   >>      C111112111133131121133133313331333131333132322331333121133112122   >>