Subset Retrieval

Rahul and Kiran were talking with each other. Suddenly Anju came towards them and reminded them of a previous challenge she had given them and they failed. So They too decide to give her a unique challenge to teach her a lesson. They tell her that they will each recite a word and Anju has to find out the one unique word that is made out of common alphabets of the word spoken by them, taken in ord