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siblings(X, Y)
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%commands to the interpreter are submitted from stdin input ('show input' box below) %'halt.' will be automatically appended to stdin input. %swi-prolog 7.6.4 parent(mark, ivan). parent(bogdan, anna). parent(mark, nadia). parent(ivan, maria). parent(anna, maria). parent(ivan, petr). parent(anna, petr). woman(maria). woman(anna). married(anna, ivan). man(ivan). man(petr). %брат или сестра siblings(X, Y):- parent(Z, X), parent(Z, Y), X\=Y. %бабушка или дедушка grannies(X, Y):- parent(X, Z), parent(Z, Y). %внук или внучка grandchild(Y, X):- parent(X, Z), parent(Z, Y). %тетя или дядя aunts(X, Y):- siblings(X, Z), parent(Z, Y). %племянница или племянник nephews(Y, X):- siblings(X, Z), parent(Z, Y). %теща или тесть inlawman(X, Y):- man(Y), married(Z, Y), parent(X, Z). %свекр или свекровь inlawwoman(X, Y):- woman(Y), married(Y, Z), parent(X, Z).
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