C2123132222131133131121131211113313333133313331333132233132233132322221   >>    C212313222213113313112113121111331333313331333133313223313223313232222   <<    C2123132222131133131121131211113313333133313331333132233132233132322223   >>      C2123132222131133131121131211113313333133313331333132233132233132322222   >>