egison-3.7.13: sample/prime-millionaire.egi

(define $combs
  (lambda [$xs]
    (match-all xs (multiset something)
      [<cons $x_1
             (loop $i [2 $n]
               <cons $x_i ...>
               _)>
       (map 1#x_%1 (between 1 n))])))

(define $p?
  (lambda [$xs]
    (match xs (list integer)
      {[,{1} #f]
       [_ (prime? (read (S.concat (map show xs))))]})))

(define $main
  (lambda [$args]
    (each (compose show print) (filter p? (combs (map read args))))))