#include <iostream>
#include <cstdio>
#include <cstring>
using namespace std;

int main()
{
	char a[1000];
	int n = 0, word = 0, com = 0;
	while ((a[n] = getchar()) != '\n')
	{
		if (a[n] != ' ')
		{
			word ++;
		}
		else
		{
			if (word && com)
			{
				cout << ',' << word;
			}
			else if (word)
			{
				cout << word;
				com = 1;
			}
			word = 0;
		}
	}
	if(word)
	{
        cout << ',' <<word;		
	}
	return 0;
}