Mono-alphabetic substitution: Polybe

RootMe Challenge: Monoalphabetic substitution - Polybe: A strange person contact you after purchasing a parchment of weird origin … He is counting on your quick wit to decrypt this message! You will need to deploy all your cryptanalyses faculties.


b4 m
a4 o
a1 t
d3 d
a3 e
e1 p
e3 a
d1 s
c4 l
e5 u
b1 r
d2 i
d4 n
c5 v
b2 h
c1 q
c2 g
e2 f
c3 b
b3 c
b5 x
d5 y
a2 j