#include <bits/stdc++.h>

//#define fin cin
//#define fout cout

#define F first
#define S second

using namespace std;

typedef long long ll;

int n , i;
char sir[110];

string a;

int main()
{
    #ifndef ONLINE_JUDGE
    freopen("input.in","r",stdin);
    freopen("output.out","w",stdout);
    #endif // ONLINE_JUDGE

    /*
    #ifndef ONLINE_JUDGE
    ifstream fin("input.in");
    ofstream fout("output.out");
    #endif // ONLINE_JUDGE
    */

    gets(sir + 1); int n = strlen(sir + 1);
    for (i = 1; i <= n; ++i)
    {
        if (sir[i] == '.') continue;
        if (sir[i] == '-') continue;

        if (sir[i] == ',') a.push_back(' ');

        a.push_back(sir[i]);
    }

    for (i = 0; i < (int)a.size() - 1; ++i)
    {
        if (a[i] == ' ' && a[i+1] == ' ')
            continue;
        printf("%c", a[i]);
    }
    printf("%c", a.back());


    return 0;
}