'BEGIN'
    'COMMENT' 'LIBRARY' 1;
    'BOOLEAN'
        A,
        B,
        C;
    'INTEGER'
        I,
        J;
    A := B := C := 'TRUE';
    I := J := 1;
    A := I = J;
    B := I # J;
    C := A := B;
    C := A = B;
    C = A = B;
    OUTREAL(99, 'IF' A 'THEN' 0 'ELSE' 'IF' B 'THEN' 2 'ELSE' 3);
'END'