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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def rrInitialisationRequest():
 """RR Initialisation Request Section 9.1.28.a"""

    a = TpPd(pd=0x6)
    b = MessageType(mesType=0x3c)  # 00111100
    c = CiphKeySeqNrAndMacModeAndChannelCodingRequest()
    e = MobileStationClassmark2()
    f = Tlli()
    g = ChannelRequestDescription()
    h = GprsMeasurementResults()
    packet = a / b / c / e / f / g / h
    return packet