def time_dif(h1, m1, s1, h2, m2, s2):
    hdif = h2 - h1
    mdif = m2 - m1
    if mdif < 0:
        hdif -= 1
        mdif += 60
    sdif = s2 - s1
    if sdif < 0:
        mdif -= 1
        sdif += 60
    return hdif, mdif, sdif