DECIPHER 1 : ATBASH

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Atbash Cipher was originally a monoalphabetic substitution cipher used for the Hebrew alphabet. It is one of the earliest known subtitution ciphers to have been used, and is very simple as it does not use a key. It simply reverses the plaintext alphabet to create the ciphertext alphabet.

Plaintext - Ciphertext:

A - Z

B - Y

C - X

D - W

E - V

F - U

G - T

H - S

I - R

J - Q

K - P

L - O

M - N

N - M

O - L

P - K

Q - J

R - I

S - H

T - G

U - F

V - E

W - D

X - C

Y - B

Z - A

Example:
Agent = ZTVMG

Try to answer this:
↳ BLFI MZNV

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