# Permutations with repetitions

How many times can the input of 1.2.2.3.3.3.4 be permutated into four digits, three digits, and two digits without repetition?

Ex:

4 digits = 1223, 2213, 3122, 2313, 4321. . etc

3 digits = 122.212.213.432. . etc

2 digits = 12, 21, 31, 23

I have tried the permutation formula, and it failed.

Ex:

4 digits = 1223, 2213, 3122, 2313, 4321. . etc

3 digits = 122.212.213.432. . etc

2 digits = 12, 21, 31, 23

I have tried the permutation formula, and it failed.

### Correct answer:

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