#include <iostream>

using namespace std;

int main()
{
    string str;
    while(getline(cin, str)){
        int num[26] = {0};
        for(int i = 0;i < str.size();i++){
            if('A' <= str[i] && str[i] <= 'Z'){
                int index = str[i] - 'A';
                num[index]++;
            }
        }
        for(int i = 0;i < 26;i++){
            char zimu = 'A' + i;
            cout << zimu << ":" << num[i] << endl;
        }
    }
    return 0;
}