Caesar Cipher / ROT13
Classic substitution cipher with adjustable shift. Encrypt and decrypt text.
125
A → N
B → O
C → P
D → Q
E → R
F → S
G → T
H → U
I → V
J → W
K → X
L → Y
M → Z
N → A
O → B
P → C
Q → D
R → E
S → F
T → G
U → H
V → I
W → J
X → K
Y → L
Z → M
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