Define an ascending number to be a positive integer of $2$ or more digits where the digits are strictly increasing moving left to right, and all digits must be from the set $1,2,3,4,5,6,7$. Similarly, define a descending number to be a positive integer of $2$ or more digits where the digits are strictly decreasing moving left to right, and all digits must be from the set $0,1,2,3,4,5,6,7$. Let $A$ equal the total number of ascending numbers and let $B$ equal the total number of descending numbers. What is $|A-B|$?