#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n=0,i,m=0,a[1000]={0};
    char b[1000];
    cin>>b;
    for(i=0;b[i]!='.';i++){
        a[b[i]-'a']++;
        m++;
    }
    for(i=0;i<26;i++){
        if(i%5==0&&i!=0)
            cout<<endl;
        if(a[i]>0)
            cout<<char(i+97)<<":"<<a[i]<<" ";
    }  
return 0;
}
/**************************************************************
	Problem: 1164
	User: wengsihan
	Language: C++
	Result: Accepted
	Time:11 ms
	Memory:2072 kb
****************************************************************/