#include<iostream>
#include<cstring>
using namespace std;
int n;
char s[10100];
string sol;

int main()
{
    std::ios_base::sync_with_stdio(false);
    cin.getline(s, 10000);
    n = strlen(s);
    for(int i = 0; i < n; ++i)
    {
        if(s[i] == '.' || s[i] == '-')
            continue;
        if(s[i] == ',')
        {
            sol += " ,";
            continue;
        }
        sol += s[i];
    }
    cout << sol << "\n";
    return 0;
}