''' Purpose: Implement module xmum
'''



def maxi( x, y ) :
    ''' Returns the value indicated by the xnum test problem
    '''


    pass


''' *** YOU SHOULD NOT MODIFY THE BELOW CODE ***  '''

if ( __name__ == '__main__' ) :

    xs = [ [5, 6, 5], [7, 3, 5, 5],  [4, 7, 7, 8, 2, 3], [] ]
    ys = [ [1, 4, 6], [4, 8, 2, 7],  [3, 8, 4, 4, 8, 5], [] ]
    n = len( xs )
    for i in range( 0 , n ) :
        x, y = xs[ i ], ys[ i]
        try :
            r = maxi( x, y )
            print( 'maxi(', 'x' + str(i+1), ',', 'y' + str(i+1), ') =', r )
        except Exception as e :
            print( e )
        print()