#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: houshanglin
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/