'''
    this program requires to find the first 2 maximum elements.

    inputs: a, b, c, d
    outputs: maximum1, mximum2

    How to do it?

       find max1 and min1 of a, b
       find max2 and min2 of c, d
       find maximum1 and maximum2
       if max1>max2
           maximum = max1
           miximum2 is the maximum of max2 and min1


'''
