program ideone;
var a, b, c, d: boolean;
 
function F(a, b, c, d: boolean): boolean;
//var p, q: boolean;
begin
	//p := not (a or b) or c;
	//q := ((a and b) or c) = (d xor a);
	//F := not p or q;
	F := a or b or c or d;
end;
 
begin
 
	writeln('a b c d F');
	for a:= false to true do
		for b:=false to true do
			for c:=false to true do
				for d:=false to true do
					begin
					writeln(a,b,c,d,F( a,b,c,d));
					end;
	//writeln(F(a, b, c, d));
end.

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