#include <iostream>
#include <string.h>

using namespace std;

char s[101];

int main()
{
    cin.get(s, 101);

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

    return 0;
}