Jesse and his Password

Jesse is a very smart guy. He had made a lot of money with blue sky and now he wants to store that money at a safe place. So, he buys a locker, keeps the money in it and sets a password. The password he creates is very unique. He writes a String S[] of size J(all lowercase letters) on a paper and taking initials of each word of S, creates another String K[]. The characters in K are in the same ord