! this won't work until after some work in the practicals
let
    var a : Integer;
    var b : Integer

in
    begin
        a := 4;
        b := 2;
        
        putint(a);
	puteol();
        putint(b);
        puteol();
        putint(|a);
        puteol();
        putint(|b);
        puteol()
    end