Generating a Two random Strings With a Dash In Between

I am wondering how to make a code in python 3.4.3 that can generate two 3 character long strings. One Digits 0 - 9, and the other capital letters of the alphabet. There also has to be a dash between them.

Examples:

MUS-875

KLE-443

AMI-989

Ect.

This is what I have

from random import randint

print(randint(2,9))

Thank you!