I have been trying to solve the third problem for over 30 mins and I am completely stumped. I am loving the game, I just wish I could think more outside the box to understand the hints. I have looked at the hints and the other post here but I am still stuck.

Wow. Thank you for enjoying my game so much. I think you've seen the third problem up to 3_w.txt.

This problem is also related to the alphabet extraction of each word. It is recommended that you write down what you saw in 3_w.txt.

alphabet extraction, like 1 = a 2=b and so on?? or does it have to do with the text on the sheet? or the text above the sheet? I have tried all 3. I am still very stumped. I have looked at both hints for number 3  I don't know what it means to find common ground. 

I mean, wrtie down 'one, two, three, four, five, six...' then you'll see the rule of it.