5 lines
		
	
	
		
			51 B
		
	
	
	
		
			Prolog
		
	
	
	
	
	
			
		
		
	
	
			5 lines
		
	
	
		
			51 B
		
	
	
	
		
			Prolog
		
	
	
	
	
	
a(X) :- X.
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b(X) :- X, writeln(X).
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c(X) :- X, X.
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a(X) :- X.
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b(X) :- X, writeln(X).
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c(X) :- X, X.
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