#include<bits/stdc++.h>
using namespace std;
int main()
{
	int m[26]={0};
	char a[100];
	cin>>a;
	for(int i=0;a[i]!='.';i++)
	{
		m[a[i]-97]+=1;
	} 
	for(int i=0;i<26;i++)
	{
		if(m[i]>0&&m[i]!=0)
		{
			cout<<char(i+97)<<":"<<m[i]<<" ";
		}
	}

	return 0;
}

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