HDU 1219: AC Me

///@author Sycamore, ZJNU
///@accepted_on 2017-01-24
#include<iostream>
#include<string>
#include <algorithm>
using namespace std;
int main()
{
    string s;
    while (getline(cin, s))
    {
        for (int i = 0; i < 26; i++)
        {
            cout << char(‘a‘ + i) << ‘:‘ << count(s.begin(), s.end(), ‘a‘ + i) << endl;
        }
        cout << endl;
    }
    return 0;
}