In order to celebrate the admission of new members, Coach Fang resolves to hold a programme named . Participants include Coach Fang, Boss Niu, God Chai, Brother Wang, Teacher Gao and Senior Wang, six persons in total. Initially all of them will be distributed one card which contains a number. It is known that five of the numbers on their cards are identical, and the rest one is different.
    Now give you six numbers on the cards, please print the different one.