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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 channelModeModifyAcknowledge():
 """CHANNEL MODE MODIFY ACKNOWLEDGE Section 9.1.6"""

    a = TpPd(pd=0x6)
    b = MessageType(mesType=0x17)  # 00010111
    c = ChannelDescription2()
    d = ChannelMode()
    packet = a / b / c / d
    return packet