def combine(a, b):
    """''  a=('4.4', [3, 1, 0]), b=('4.5', [1, 0, 2])
           combine(a,b)=('4.4', [4, 1, 2])  """
    c = a[:]
    for i in range(len(a[1])):
        c[1][i] += b[1][i]
    return c
