You might want to be careful exactly what name you give yourself. 3 letter names might/might not go over well, depending on site policies. I say this of course, because the profanity filter does seem to have some rather innocent but bizzare ommissions. Such as where I mentioned in a recent thread about my Tai Chi teacher's father having had someone over for ****tails, it filtered that as a bad word, and we all noticed the same on 9/11 when people couldn't mention the terrorists gaining entry to the ****pit of the plane without similar effect.
The very fact, there is such a filter, might suggest your desired name might not be a smart choice