[newsoundwave]

My substitutions:

in out

x n

n e

b r

l a

f y

s o

c t

i f

j h

v u

z w

o g

u s

d v

h d

k j

m c

p i

q k

r m

a p

g b

Not sure if it's my mistake or their mistake, but there are two typos in the cleartext.

[Prophasi]

The very first word in the instructions, "cryptograms" -- coincidentally the entire subject of the exercise -- is misspelled. Pretty sure that will fall on them. It's not very reassuring in an agency where attention to detail is of paramount concern.

[gyom]

Since you're giving your solution, might as well spell out the message.

"when angry, count ten before you speak; if very angry, an hundred" -thomas jefferson

"when angry, count four; when very angry, swear." -mark twain

[crazypyro]

I thought by the instructions they meant the same code that is used in the example "The Smart Cat" was used in the 2 codes below, but then it made no sense. -_-