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

int main()
{
	int n;
	cin >> n;
	vector<int> abc(26, 0);
	string s;
	cin >> s;
	for (int i = 0; i < n; i++)
	{
		if (s[i] - 'a' >= 0 && s[i] - 'a' <= 26)
		{
			abc[s[i] - 'a']++;
		}
	}
	for (int i = 0; i < 26; i++)
	{
		if ((abc[i] % 5 == 0 || abc[i] % 7 == 0) && (abc[i] != 0))
		{
			cout << char(i + 'a') << " " << abc[i] << endl;
		}
	}
	return 0;
}