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- 0 rem << cd36-2 >>
- 5 print"[147] basic recursion"
- 10 s$="tteessstt"
- 20 n=1 : p(n)=1 : gosub 80
- 30 end
- 80 p=p(n)
- 90 if mid$(s$,p,1)<>mid$(s$,p+1,1) then print mid$(s$,p,1);
- 100 if p<len(s$) then n=n+1: p(n)=p+1: gosub 80
- 105 print p(n);
- 110 n=n-1 : return
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