#include <iostream>
#include <vector>
using namespace std;

int main() {
	std::vector<char> v{'b', 'c', 'd'};

	cout << "before - " << v.size() << ":";
	for(auto c : v) {
		cout << " " << c;
	}
	cout << endl;

	v.insert(v.end(), {'a', 'k', 'e', 'e', 'f'});

	cout << "after - " << v.size() << ":";
	for(auto c : v) {
		cout << " " << c;
	}
	cout << endl;

	return 0;
}