#include <cstdio>
#include <iostream>
#include <vector>
#include <queue>
#include <utility>
#include <algorithm>
#include <functional>
#include <string>
#include <cstring>
#include <cmath>
#include <map>
#include <set>
#include <bitset>
#include <stack>
#include <iomanip>
#include <fstream>
#define MOD 105011
#define NMAX 1005
#define INF 0x3f3f3f3f
#define pb push_back

using namespace std;

//FILE *fin = freopen("schi.in", "r", stdin);
//FILE *fout = freopen("schi.out", "w", stdout);

typedef pair<int, int> pii;

char s[NMAX];

int main() {
	int i, n;

	cin.get(s, NMAX);

	n = strlen(s);
	if (s[0] == ',')
		cout << ' ';
	for (i = 0; i < n; ++i) {
		if (s[i] != '.' && s[i] != '-')
			cout << s[i];
		if (s[i + 1] == ',')
			cout << ' ';
	}

	return 0;
}