i think so because of all the characters

here is a brief example on decrypting ascii let say i have A 4 5 v k ^ %

A=0
4=+1
5=+2
v=+3
so the first letter always stays with the first one so a will always be A 4+1=5 so so far its

a5

and you keep on adding + to each number

its more difficult but thats just the basic