#include<iostream>
#include<unordered_map>

using namespace std;

int main() {
	string s;
	
	while (cin >> s) {
		unordered_map<char, int> mp;
		string str = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
		for (int i = 0; i < s.size(); i ++ ) {
			mp[s[i]] ++ ;
		}
		for (int i = 0; i < str.size(); i ++ ) {
			cout << str[i] << ":" << mp[str[i]] << endl;
		}
		cout << endl;
	}

	return 0;
}