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  1. or download this
    #lang scheme
    (define (sum-of-ints li [sum 0])
    ...
    
    (for ([r test-data])
      (printf "~a ~a~n" r (roman-to-dec r)))
    
  2. or download this
    +% mzscheme roman.ss
    XLII 42
    LXIX 69
    mi 1001
    MCMLXXXV 1985