#include <iostream>
#include <map>
using namespace std;

int main()
{
   map <char, int> box;

   char stroka[100];
   cin.getline(stroka, 100);

   int l = 0;
   while (stroka) {

        box[stroka[l]]++;

        l++;
   }



  for(map<char,int>::iterator it =box.begin();it !=box.end();it++)
  {
      cout << it->first << " : " << it->second << endl;
  }

}