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pascal

var z: integer;
var r, a, b: integer;

x: integer  = 42;
y: integer  =7;
begin
    if y>x then 
    begin
        z:=x;
        x:=y;
        y:=z;
    end;
    a:=x;
    b:=y;
    while b>0 do 
    begin
        r:=a mod b;
        a:=b;
        b:=r;
    end;
    writeln(a);
    writeln(x);
    write(y);
end.

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