question:  Why is it unexpectedly hard for the men to forge letters for the children?
context: So when the Chief of World Security told him that he had been selected as the answer to the Solar System's greatest mystery, Jery assumed that it was because of his mental agility. But when he got to Mars to find out why fifteen boys had vanished from a spaceship in mid-space, he found out that even his quick mind needed time to pierce the maze of out-of-this-world double-dealing. While everyone else looked forward variously to becoming firemen, cowboys, and trapeze artists, Jack was devouring every book he could get his hands on, figuring that "if I put enough literature into my head, some of it might overflow and come out." After sixteen years of education, Jack found himself teaching high school English in Chicago, a worthwhile career, but "not what one would call zesty." After a two-year Army hitch, and a year in advertising "sublimating my urge to write things for cash," Jack moved to New York, determined to make a career of full-time fiction-writing. He says, "I'd like to say I do this for fulfillment, or for cash, or because it's my destiny; however, the real reason (same as that expressed by Jean Kerr) is that this kind of stay-at-home self-employment lets me sleep late in the morning." I couldn't find anything really incriminating, unless maybe it was that hair dye that unexpectedly turned bright green after six weeks in the hair, but that was the lab's fault, not mine. Security men were not hired for their loquaciousness. A copy chief in an advertising company almost always reacts to an obvious cliche. Honest, sober, civic-minded, slightly antisocial...." It's girls, sir. But if I spot it in less, they throw it out and start over again.
output:  They have to intentionally write poorly, which is proving to be difficult with the volume they have to write
options:  There is a huge amount of letters to write and families to keep up with. It's a lot of information  They have to intentionally write poorly, which is proving to be difficult with the volume they have to write  None of them are particularly good at writing letters, making it difficult for them  It makes them too emotional, because it involves children.