'BEGIN'
    'INTEGER'
        I,
        J;
    I := J := 0;
    I :=
        'IF' I = 0 'THEN'
                'IF' J = 0 'THEN'
                    1
                'ELSE'
                    2
        'ELSE'
            3;
    'IF' I = 1 'THEN'
        'IF' J = 0 'THEN'
            J := 2
        'ELSE'
            J := 3
        'ELSE'
            J := 4;
    OUTREAL(99, I);
    OUTREAL(99, J)
'END'