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Peter the boy gets only twos and fives at school. Find which grades more.
One line contains the Peter's grades. It is known that Peter gets only twos and fives, the grades are given without spaces and there are no more than 1000 grades.
Print 5 if fives more than twos. Print 2 if twos more than fives. If the twos and fives are the same amount, print the equality symbol '='.