#include <iostream>
#include <string>

using namespace std;

string s;

int main()
{
    getline(cin, s);

    for(int i = 0; i < s.size(); ++i)
        if(s[i] == ',')
        {
            cout << " ,";
        }
        else if(s[i] != '-' && s[i] != '.')
            cout << s[i];
    return 0;
}