using System;
using System.Collections.Generic;
public class Program
{
public static void Main()
string input = Console.ReadLine();
Values = new Dictionary<string, int>();
while (input != String.Empty)
int count = 0;
if (Values.ContainsKey(input)) {
count = Values[input];
}
if (count == 0)
Values.Add(input, 1);
else
Values[input] = count + 1;
input = Console.ReadLine();
foreach (string key in Values.Keys) {
Console.WriteLine("{0}, {1}", key, Values[key]);
private static Dictionary<string, int> Values
get;
set;