#include <iostream>
#include <iomanip>
#include <string>
using namespace std;

int main() {

  int count[26];

  // make sure to initialize all entries
  for (int i=0; i<=26; i++)
    count[i] = 0;


  // read the data from the user until invalid entry reached
  string word;
  cout << "Please enter full text." << endl;
  cout << "End of data should be signified with cntr-D" << endl;
  while (cin >> word) {
    char leading = word.at(0);

    if (leading >= 'a' && leading <= 'z')
      count[leading-'a']++;
    else if (leading >= 'A' && leading <= 'Z')
      count[leading-'A']++;

  }


  // generate the histogram
  for (int i=0; i<26; i++) {
    char c = (i+'a');
    cout << c << " : " << setw(5) << count[i] << endl;
  }

}