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-
- /* Copyright (C) 1988, 1989 Herve' Touati, Aquarius Project, UC Berkeley */
-
- /* environment trimming */
-
- main :- a(X1, X2, X3, X4, X5, X6),
- b(X1, X2, X3, X4, X5, X6),
- c(X1, X2, X3, X4, X5, X6),
- write(X6), nl.
-
- a(X1, X2, X3, X4, X5, X6).
-
- b(X1, X2, X3, X4, X5, X6) :-
- X1 = [Y1|X2],
- X2 = [Y2|X3],
- X3 = [Y3|X4],
- X4 = [Y4|X5],
- X5 = [Y5|X6].
-
- c(X1, X2, X3, X4, X5, X6) :- X1 = [1, 2, 3, 4, 5 | ok].
-