I doubt you'll have to eat your sock.. as the 2 halfs of the world cup ladder have been in different leagues.... and of course you had to ask here where you'd get shit advice that would probably do you a fair bit of damage to your health if you don't do it right. You're lucky I bothered to reply since I'm not an idiot and have common sence.
I would suggest making sure the sock you use is 100% cotton or a NATURAL fibre <---- important
If its polyester, i.e plastic made from oil, you deserve to die
Whatever you do, don't cook or burn the sock, as that changes it chemicly, even if its cotton. It will have a negative impact on your health.
I suggest to just stick it in a blender and reduce it to a powder. Then just mix it into a shitload of strong sauce like curry sauce and you'll hardly be able to feel it or taste it as it would bascially be liquid so no chewing would be involved - would probably be quite nice.. considering its a sock
Also, it being powered will help with digestion, and won't clog up your insides. I mean if you ate a polyester sock in large lumps you're just going to clog up your intestines with a shitload of oil chemical plastic that doesn't digest or disolve (well, it takes 10,000 years) and you'll probably end up needing surgury to fix it.
Cotton however is just strands of a plant and will digest normally like any other food.