#include <iostream>
#include <algorithm>    // std::next_permutation, std::sort
#include <cstdlib>
using namespace std;
 
int main (){
    string palavra;
 
    palavra = "BIO";
    cout << "Entre com a palavra" << endl;
    cin >> palavra;
 
    std::sort (palavra.begin(),palavra.end());
 
    system("cls");
    do {
        std::cout << palavra << '\n';
    } while ( std::next_permutation(palavra.begin(),palavra.end()) );
 
 
 
    cin.ignore();
    return 0;
}

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

QklP

BIO