#include <iostream>
#include<cmath>
#include<algorithm>
#include<string>
#include<limits.h>
#include<list>
using namespace std;


int main(){

        string s; cin>>s;
        int cnt=0;
        sort(s.begin(),s.end());
        s.push_back(' ');
        for(   int i=0    ;  i<s.size()-1 ; i++   ){
            if(s[i]!=s[i+1]){
                cout<<s[i]<<" : "<<cnt+1<<endl;
                cnt=0;
            }
            else {
                cnt++;
                cout<<s[i]<<" : "<<cnt+1<<endl;

            }


        }

        return 0;
    }