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SKI combinator emulator by Kazu Yamamoto Commands: get -- show the table of combinator definition clear -- initialize the table of combinator definition def -- define combinator eval -- evaluate expression % ghci Command.hs > eval "((S(KS))K)xyz" (x(yz)) > eval "S(KS)Kxyz" (x(yz)) % ghci Command.hs > get fromList [('K',K),('S',S)] > def "I=SKK" > get fromList [('I',((SK)K)),('K',K),('S',S)] > eval "Ix" x > def "B=S(KS)K" > eval "Bxyz" (x(yz)) > clear > get fromList [('K',K),('S',S)] Combinator definitions: def "I=SKK" def "B=S(KS)K" def "C=S(BBS)(KK)" def "T=CI" def "W=ST" def "M=SII" def "L=CBM" def "Y=SLL"