def f( x, y ) :
    ''' Solves the eval.f() homework 24 problem description
    '''

    # The + way
    # The + operator can combine two lists (elements of lists into one list)
        # [1,2,3] + [4,5,6] -> [1,2,3,4,5,6]
    # answer = x + y
    # return answer

    # The loop way
    answer = []     # Build up a list and add elements to them one at a time
    # Add everything in x
    for element in x: # Go through each element in x
        answer.append( element )    # Add each element in x into our answer
    # Add everything in y
    for element in y: # Go through each element in y
        answer.append( element )    # Add each element in y into our answer
    return answer

    # General Accumulation Function For a List
    # accumulator = []
    # for ...
        # accumulator.append( ... )
    # return accumulator



''' DO NOT MODIFY THE BELOW CODE ''''

if ( __name__ == '__main__' ) :
    import eval

    x1 = [ ];                y1 = [ ]
    x2 = [ 3, 1, 4 ];        y2 = [ ]
    x3 = [ ];                y3 = [ 2, 7, 8 ]
    x4 = [ 3, 1, 4 ];        y4 = [ 1, 5, 1, 9 ]

    z1 = eval.f( x1, y1 );   print( 'f( x1, y1 ) =', z1 )
    z2 = eval.f( x2, y2 );   print( 'f( x2, y2 ) =', z2 )
    z3 = eval.f( x3, y3 );   print( 'f( x3, y3 ) =', z3 )
    z4 = eval.f( x4, y4 );   print( 'f( x4, y4 ) =', z4 )