var a := True;
var b := False;

Print('a = ');
PrintLn(a);
Print('b = ');
PrintLn(b);

Print('a AND b: ');
PrintLn(a AND b);

Print('a OR b: ');
PrintLn(a OR b);

Print('NOT a: ');
PrintLn(NOT a);

Print('a XOR b: ');
PrintLn(a XOR b);