I could not remember the formula, so I looked it up. Math is fun.
Number of permutations, P = n!/(n-r)!
where n is the number of things to choose from, and we choose r of them, no repetitions, order matters.
In this case, allowing for simple typographical errors, n=31 and there are r=7 letters needed (assume typos do not create an 8 letter misspellings, upper and lower cases don't matter).
Let's just say, that is a BIG number and leave it at that that. P = 13,253,058,000
Last edited by Bad Lag; 09-08-21 at 09:31 AM.