#include <iostream>
#include <string>
using namespace std;
int main(){
    string s;
    getline(cin, s);
    int c = s.find('-');
    while(c != -1){
        s.erase(c, 1);
        c = s.find('-');
    }
    c = s.find('.');
    while(c != -1){
        s.erase(c, 1);
        c = s.find('.');
    }
    c = s.find(",");
    while(c != -1 && c < s.length()){
        if(s[c-1] != ' ') s.insert(c, " ");
        c = s.find(",", c+2);
        //cout << c << " - " << s.length() << endl;

    }
    cout << s;
    return 0;
}