As a first step, enter the word, which you want to have used for permutation.Then enter the number of made passwords. You also can set the lenght to shorten the password. The abbrevation is made after the shufling and is not neccessery.
If you use own options, you can affect two things. The shift of the letters, that means maximum number of positions a letter can shift, and the number of passings, tahat means how many times each letter will be shifted.
Permutations won't be made of word shorter han five letters. Ther also may not be mate the amount passwords that was set, rarely even none, for example at words like "aaaaa".