Lord Of The Keys

When randomizing the order of Lord Of The Keys, the number of possible unique permutations in which we can obtain keys is given by:

7! = 5,040

However, there are some restrictions:

Shopkeeper's Key must be obtained before Elegant Key. This reduces valid permutations by half.

Therefore, the total number of valid permutations is:

7! / 2 = 2,520

Built by Marclap. The source code is available on Github.