10 DIM R$(2,5) 20 LET S$=CHR$ (CODE "Q"+CODE "0") 30 LET H$=CHR$ (CODE "Q"+CODE "F") 40 LET R$(1)=S$+"11R"+S$ 50 LET R$(2)=S$+"B1S"+H$ 60 LET B$="B" 70 LET T$="111"