#include <iostream>
#include <string.h>
using namespace std;
char a[1000];
int i,n;
int main()
{

    cin.getline(a,10000);
    n=strlen(a);
    for(i=0;i<n;i++){
        if(a[i]!='-'&& a[i]!='.' && a[i]!=',') cout<<a[i];
        if(a[i]==',') {
                cout<<" "<<a[i];
                if(isalpha(a[i+1])==0) cout<<" ";
        }
    }
    return 0;
}