I cannot tell what you're asking exactly. However, ill explain a few things. The English w and the Greek ω are not the same letter. They do look similar, yes. Now, omega (ω) is the last letter of the Greek alphabet. Where as W is the 23rd letter of the standard English alphabet. They are completely pronounced differently. Now, for the activity that took place here, you're just naming what letter it was. Which, as I explained, is Omega. :)
If you know the Greek letters I suggest you move on to more interesting Skills. This one has several bugs we have not been able to remove.
REad the Tips & notes from the first 5 Skills which review the ABCs including how to find them on the keyboard, he to pronoucn e them etc.