<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def configurationChangeAcknowledge():
 """CONFIGURATION CHANGE ACKNOWLEDGE Section 9.1.12c"""

    a = TpPd(pd=0x6)
    b = MessageType(mesType=0x31)  # 00110001
    c = MobileId()
    packet = a / b / c
    return packet