#include<bits/stdc++.h>
using namespace std;

int main(){
	
	string s;
	getline(cin, s);
	
	int cnt[50] = {0};
	for(int i = 0; i < s.length(); i++){
		if(s[i] >= 'A' && s[i] <= 'Z') cnt[(s[i] - 'A')] ++;
	}
	
	for(int i = 0; i <= ('Z' - 'A'); i++){
		cout << (char)(i + 'A') << ":" << cnt[i] << endl;
	}
	
	return 0;
}