#include <bits/stdc++.h>
using namespace std;
int main() {
   string s;
   while (cin>>s) {
      int apl[26]={0};
      int len = s.length();
      for (int i = 0; i < len; i++) {
         if (s[i] >= 'A' && s[i] <= 'Z') {
            apl[s[i]-'A']++;
         }
      }
      for (int i = 0; i < 26; i++) {
         char c = 'A' + i;
         cout<<c<<":"<<apl[i]<<endl;
      }
   }
}