Chef And Crypto

Chef Yakawaka's son learns cryptography, it's just woww.. . Chef Yakawaka's son, Ramu used to send letters to his friends in class. But the letters would often reach the hands of his teacher. Since Ramu was notorious and used to write offensive words, he would get scolded often. One day he heard about cryptography and decided to encrypt his letters with a special number. The number would be writt