JayaSurya and the string transformation

In CEG, there is a guy named Jaya Surya, who is always childish in his actions :P. One day, he studied about strings in his first semester CT class. Being childish, he started playing with strings. He constructed a message made up of upper case english letters to say to his best friend. ( Obviously girl friend :P ). But what happened is that his friend Ravi, just to make fun of him, transformed so