EXPORTS['unsafe-car'] =
    plt.baselib.functions.makePrimitiveProcedure(
        'unsafe-car',
        1,
        function(MACHINE) {
            return MACHINE.e[MACHINE.e.length - 1].first;
        });


EXPORTS['unsafe-cdr'] = 
    plt.baselib.functions.makePrimitiveProcedure(
        'unsafe-cdr',
        1,
        function(MACHINE) {
            return MACHINE.e[MACHINE.e.length - 1].rest;
        });