1021

#include<iostream>
#include<string>
#include<vector>
#include<map>


using namespace std;


int main()
{
    string n;
    cin >> n;
    map<char, unsigned> number_count;

    for (auto &r : n)
    {
        number_count[r]++;
    }
    size_t i = 0;
    size_t count = number_count.size();
    for (auto &r : number_count)
    {
        if(i<(count-1))
            cout << r.first << ":" << r.second << endl;
        else
        {
            cout << r.first << ":" << r.second;
        }
    }


    cout << endl;
    system("pause");
    return 0;
}