C++ List STL's Etherator Usage

#include <iostream>
#include <list>

int main() {
    std::list<std::string&> list = {"January", "February", "March", "April", "May"};

    std::list<std::string&>::iterator listItr = list.begin();

    while (listItr != list.end()) {
        std::cout << (*listItr).at(0) << "\n";
        ++listItr;
    }

    return 0;
}