Code:
def STR(a):
    a = str(a)
    
    for i in range(0, len(a) - 1, 2):
            print(chr(int(a[i:i+2]))),

STR(7269767679) = "HELLO"


a = 0
b = 22443938263631876368983
n = 928669833265826932708591

C = e * M 
M = d * C
e = 141597355687225811174313
d = 87441340171043308346177
C = (236857987845294655469221, 12418605208975891779391)
...