//
//  main.cpp
//  Lumber Jack and Grammar
//
//  Created by Nasca Sergiu Alin on 03/03/16.
//  Copyright © 2016 Nasca Sergiu Alin. All rights reserved.
//

#include <iostream>
#include <string.h>

char str[102];

int main()
{
    std::cin.get(str,102);
    for(int i=0; i<strlen(str); ++i)
    {
        if(str[i] == ',')
        {
            std::cout<<" ,";
        }
        else if(str[i] != '-' && str[i] != '.')
        {
            std::cout<<str[i];
        }
    }
    return 0;
}