#include <iostream>
#include <string>
#include <algorithm>
 
int main() {
    std::string s1 { "azerty" };
    std::rotate(begin(s1), begin(s1) + 2, end(s1));
    std::cout << s1 << std::endl;
    
    const std::string s2 { "azerty" };
    std::string s3       { "......" };
    std::rotate_copy(begin(s2), begin(s2) + 2, end(s2), begin(s3));
    std::cout << s3 << std::endl;
}