# Challenge: Permutation of an Array

Complete the permutation of an array challenge.

## We'll cover the following

## Permutation of an array

Write a Java code to print out all the permutations of a given array with repetition.

Recursive solutions must cater to the `String`

concatenation.

For example, let the string be `xyz`

, and all the permutations with repetition must be printed. The code should print the following:

```
xyz xzy yxz yzx zxy zyx
```

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