{if freebie_2}
    {exp:switchee variable="{freebie_2}" parse="inward"}
        {case value="#^P(\d+)$#|''"}
            {embed='document/listing'}
        {/case}
        
        {case value="result"}
            {embed='document/result'}
        {/case}

        {case default="Yes"}
            {embed='document/listing'}
        {/case}
    {/exp:switchee}
{if:else}
    {embed='document/listing'}    
{/if}