Just to list all permutations of a-z with a length of 26, there would be 403,291,461,126,605,635,584,000,000 lines. Thats 403 billion billion billion lines. And that doesn't even include the permutations that are 25 characters long, 24 characters long, 23 characters long, etc.
(26!/(26-26)!) + (26!/(26-25)!) + (26!/(26-24)!) + ...
n! = n*(n-1)*(n-2)...*2*1
*note: 0! = 1
If my calculations are correct, there would be 1,096,259,850,353,149,600,000,000,000 lines (mIRC rounding limits apply).
-genius_at_work
