#include <iostream>
 #include <algorithm>
 #include <string>
 #include <vector>
 
 int main(){  
 
    std::vector<std::string> vec;
    vec.push_back("stack123");
    vec.push_back("STackOverflow");
 
    for ( int i=0; i<vec.size(); ++i )
    {
        std::string & str = vec[i];
        std::sort(str.begin(), str.end());
    }
 
    for ( int i=0; i<vec.size(); ++i )
    {
        std::cout << vec[i] << std::endl;
    }
    return 0;   
 }

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