Badugi Hand Ranking

Introduction
Badugi hands are made of 4 cards. Unique ranks and suits are used only. A hand consists of the lowest ranked cards of each unique suit. A 4 card badugi hand beats any 3 card badugi hand, and so on. Ace is low.

Nuts. The best possible hand is A, 2, 3, 4 all of different suits.