#include <iostream>
using namespace std;

int arr[30] = {0};

int main(){
	string str;
	int index;
	cin>>str;
	for(int i = 0; i<=str.size()-1; i++){
		if(str[i]>='A'&&str[i]<='Z'){
			index = str[i] - 'A';
			//从arr[0]开始 
			arr[index]++;
		}
	}
	char ch;
	for(int i = 0; i<26; i++){
		ch = 'A' + i;
		cout<<ch<<':'<<arr[i]<<endl;
	}

	return 0;
}