#include<iostream>
#include<cstdio>
#include<cmath>
#include<algorithm> 
#include<string>
#include<cstring>
using namespace std;
int main()
{
    string s;
    while(cin >> s){
        int count[26] = { 0 };
        for (char c : s) {
            if (c >= 'A' && c <= 'Z') {
                int index = c - 'A';
                count[index]++;
            }
        }
                
       
        for (int i = 0; i < 26; i++) {
            cout << (char)('A'+i) << ':' << count[i] << endl;
        }
    }
    return 0;
}