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

int main() {
    string str;
    while(cin >> str) {
        map<char, int> cnt;
        for(int i = 0;i < 26; i++) {
            cnt[char(int('A' + i))] = 0;
        }
        for(int i = 0;i < str.length(); i++) {
            if(str[i] >= 'A' && str[i] <= 'Z'){
                cnt[str[i]]++;
            }
        }
        for(auto iter = cnt.begin(); iter != cnt.end(); iter++){
            cout << iter->first << ':' << iter->second << endl;
        }
        

    }
    return 0;
}