Answer to life, the universe, and everything
Golfscript, 20

26,{.97+\{.}*}%=42`*


with new line, 21 chars (by Nabb)

26,{).[96+]*}%n+=42`*


Actually Nabb beat mine, here is original solution for with new line, 22 chars

26,{.97+\{.}*}%n+=42`*


This is simply generating source string and just comparing it against string from stdin.