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