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Annotation of 43BSD/contrib/icon/book/f/abcd.icn, revision 1.1.1.1

1.1       root        1: procedure main()
                      2:    while writes(line := read()) do
                      3:       if line ? (ABCD("","","","") & pos(0))
                      4:       then write(" accepted")
                      5:       else write(" rejected")
                      6: end
                      7: 
                      8: procedure ABCD(A,B,C,D)
                      9:    suspend (=A || =B || =C || =D) |
                     10:       (="a" || ABCD(A,"b" || B,C || "c",D) || ="d")
                     11: end

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