Mine

[ext-meetme]
exten => _8X,1,Answer
exten => _8X,2,Wait(1)
exten => _8X,3,GotoIf($[${CALLERIDNUM} = ${EXTEN:1}]?5:4)
exten => _8X,4,MeetMe(${EXTEN}|sM)
exten => _8X,5,MeetMe(${EXTEN}|asM)

exten => _8XX,1,Answer
exten => _8XX,2,Wait(1)
exten => _8XX,3,GotoIf($[${CALLERIDNUM} = ${EXTEN:1}]?5:4)
exten => _8XX,4,MeetMe(${EXTEN}|sM)
exten => _8XX,5,MeetMe(${EXTEN}|asM)

exten => _8XXX,1,Answer
exten => _8XXX,2,Wait(1)
exten => _8XXX,3,GotoIf($[${CALLERIDNUM} = ${EXTEN:1}]?5:4)
exten => _8XXX,4,MeetMe(${EXTEN}|sM)
exten => _8XXX,5,MeetMe(${EXTEN}|asM)

exten => _8XXXX,1,Answer
exten => _8XXXX,2,Wait(1)
exten => _8XXXX,3,GotoIf($[${CALLERIDNUM} = ${EXTEN:1}]?5:4)
exten => _8XXXX,4,MeetMe(${EXTEN}|sM)
exten => _8XXXX,5,MeetMe(${EXTEN}|asM)