#include <iostream>
using namespace std;

int main()
{
    int c;
    do
    {
        c = getchar();
        if (c == '.' || c == '-')
        {
            continue;
        }
        else
        {
            if (c == ',')
            {
                cout << " ,";
                continue;
            }
        }
        putchar(c);
    } while (c != EOF && c != '\n');
    return 0;
}