Application File One

"Like the famous mad philosopher said, when you stare into the void, the void stares also; but if you cast into the void, you get a type conversion error. (Which just goes to show Nietzsche wasn't a C++ programmer.)"

Task

As a Laundry agent, you will be expected to display incredible attention to detail. It is equally important, however, not to lose sight of the bigger picture.

Find the missing letter to proceed.