I do not understand myself why this application would be wanted. If you wanted words with more than one copy of a letter ( like R E S T ) then you could type in R E S T R E S T and then see what the anagrammer gives, I would think. Because otherwise it would be like trying to create a program for unlimited R's E's S's and T's that could be too large to even process, I would think. I understood the question, but then I wondered and puzzled over why this would be wanted, for what purpose ? What made you think to ask this, is my question back to you. I am curious now. * smiling *

Just for Clarifying my above doubt.
Say the anagram word is "rest".
Then I want to have words with repeated alphabets from "r","e","s", and "t".
Then words could be. rest, steer ("e" used twice",steerer (e used thrice and r twice.)
Means the alphabets in the anagram can be used multiple times to shown all possible correct words.
And sorry if this process is not called Anagram, then what it is called.
Thank u in advance

could you please explain again, i'm not clear on what you mean by "each letter can be repeated" as in your string there are no repeating letters. please clarify