#include <iostream>
#include <vector>
#include <string>
#include <map>

std::ostream& operator<<(std::ostream&os, const std::vector<int>& v)
{
    os << "{ ";
    for (auto e : v)
        os << e << ' ';
    return os << '}';
}

int main()
{
    std::map<std::string, std::vector<int>> vecs;

    for (int i = 0; i < 10; ++i)
        vecs[std::string(1, 'a' + i)] = std::vector<int> { i * 2, i * 2 + 1, i * 2 + 2 };

    for (auto& pair : vecs)
        std::cout << pair.first << " = " << pair.second << '\n';
}