#include <iostream>
#include <map>
#include <string>
using namespace std;

int main() {
    string s;
    getline(cin, s);
    map<char, int> a;
    for (int i = 0; i < s.size(); ++i) {
        if (s[i] <= 'Z' && s[i] >= 'A') a[s[i]]++;
    }
    for (char c = 'A';  c <= 'Z' ; c++) {
         cout << c << ':' << a[c] << endl;
    }
    return 0;
}