#include <iostream>
#include <string>

using namespace std;

const int AlphSize = 52;

int main()
{
    string alphabet = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
    int count[AlphSize] = { 0 };
    int iterations;
    string sentences;
    cin >> iterations;
    cin.get();

    for (int i = 0; i < iterations; i++) {
        getline(cin, sentences);
        for (int i = 0; i < sentences.size(); i++) {
            for (int j = 0; j < alphabet.size(); j++) {
                if (sentences[i] == alphabet[j]) {
                    count[j] += 1;
                }
            }
        }
    }

    for (int i = 0; i < AlphSize; i++) {
        if (!(count[i] == 0)) {
            cout << alphabet[i] << ": " << count[i] << endl;
        }
    }
    cin.get();
    return 0;
}