## 24.4.2 Transformations - `next_permutation` (cont.)

>     vector<int> a(4);
>        // Initialize 1, 2, 3, 4
>     generate(a.begin(), a.end(), SequenceGenerator(1));
>     while (next_permutation(a.begin(), a.end()))
>     {
>        cout << "Output permutation ";
>        vector<int>::iterator p = a.begin();
>        while (p != a.end())
>        {
>           cout << *p << " ";
>           ++p;
>        }
>        cout << "\n";
>     }

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