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26 x 25 x 24 = 15600
Using the [modern] Roman alphabet, there are 15600 possible passwords that are not case-sensitive.
87400 combinations
11,881,376
You can make 916,132,832 different five-character passwords if the code can be a mixture of letters and digits in any order and is case sensitive.
you can't
There are 4 letters in IOWA, all non repeating. Arrangements are 4! or 24.
Assuming any character can appear in any position, it makes 3620 = 13,367,494,538,843,734,067,838,845,976,576 or approx 1.337 x 1031 possible different passwords.
PrecedeTreatedRoundedPlayfulCountry
If you assume 26 different letters, there are 26 to the power 5 possible variations of 5 letters.
Oratory.
lovebird