Don Colton's Risk Dice Roller

(Risk is a trademark of Parker Bros / Hasbro for their board game.)
Wikipedia Article, Attacking

How many attacking armies
How many defending armies
How many skirmishes (max)

Skirmish 1   3 6 2   3 6 attacker loses X, defender loses X
Skirmish 2   6 5 4   6 5 attacker loses X, defender loses X
Skirmish 3   6 1 4   3 4 attacker loses X, defender loses X
Skirmish 4   1 4 3   5 3 attacker loses X, defender loses X