#include <iostream>
#include <string>
#include <random>
#include <chrono>

using namespace std;

string melangeLettre(string mot);
int main()
{
    cout << "Saisissez un mot mystere: n> ";
    string motMystere{};
    cin >> motMystere;

    cout << "Quel est ce mot ?n";
    string const newMot{melangeLettre(motMystere)};
    cout << newMot << endl;

    return {0};
}

string melangeLettre(string mot)
{
    size_t random = chrono::system_clock::now().time_since_epoch().count();
    mt19937 gen{random};
    string newMot{};

    for (unsigned int i{}; i < mot.size(); ++i)
    {
        uniform_int_distribution<> getNbr(0, mot.size());
        int const alea{mot[getNbr(gen)]};

        newMot.push_back(alea);
        mot.erase(alea, 1);
    }

    return newMot;
}