Input a pair of primes p, q, e.g. [101, 103].  

Input a pair of numbers v, w,  
with vw = 1 mod (p - 1)(q - 1), 
e.g., [23, 887] for the above values of p and q.  

Input a number x representing a message, 
e.g., 2832.  

encoding

Input a number y representing an encoded message, 
e.g., 1496.  

decoding