#include <iostream>
#include <string>

using namespace std;


int main()
{
	string s;
	while(cin >> s)
	{
		for (int i = 0; i < s.length(); i++)
		{
			if (s[i] == ',')
				cout << " ,";
			else if (s[i] == '-' || s[i] == '.')
				;
			else
				cout << s[i];
		}
		cout << " ";
	}

	return 0;
}