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

#define NMAX 107

using namespace std;

char s[NMAX];

int main(){
    gets(s);
    int n = strlen(s);
    for(int i = 0; i < n; ++i){
        if( (s[i] >= 'a' && s[i] <= 'z') || (s[i] >= 'A' && s[i] <= 'Z') || s[i] == '"')
            cout << s[i];
        if(s[i] == ',')
            cout << " " << s[i];
        if(s[i] == ' ')
            cout << s[i];
    }
    return 0;
}