#include <iostream>
#include <cstdio>
#include <cstring>

using namespace std;

#define DIM 105

char sir[105];

int main() {
    #ifndef ONLINE_JUDGE
    freopen("input.txt","r",stdin);
    #endif // ONLINE_JUDGE

    cin.get(sir, 105);

    int lg = strlen(sir);

    if(sir[0] == ',') {
        cout << ' ';
    }

    for(int i = 0; i < lg; ++i) {
        if(sir[i] == '.' || sir[i] == '-') {
            if(sir[i + 1] == ',') {
                cout << ' ';
            }
            continue;
        }

        cout << sir[i];

        if(sir[i + 1] == ',') {
            cout << ' ';
        }
    }

    cout << '\n';

    return 0;
}