#include<bits/stdc++.h>
using namespace std;
int main()
{
	char a;
	int n,i,s[26]={0};
	do{
		cin>>a;
		s[int(a)-97]++;
	}while(a!='.');
	for(i=0;i<26;i++){
		if(s[i]!=0){
			cout<<char(i+97)<<':'<<s[i]<<" ";
			if((i+1)%5==0){
				printf("\n");	
			}
		}
	}
	return 0;
}

/**************************************************************
	Problem: 1164
	User: zzz
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/