#include <iostream>
#include <fstream>
#include <cstring>

using namespace std;
ifstream fin("input.in") ;

char c[105] ;

int main()
{
    cin.getline(c, 105) ;

    for(int i = 0 ; i < strlen(c) ; ++ i)
    {
        if(c[i] == '.')
            continue ;
        if(c[i] == '-')
            if(c[i - 1] == ' ')
            {
                i ++;
                continue ;
            }
            else continue ;
        else if(c[i] == ',')
            cout << " ,"  ;
        else cout << c[i] ;
    }

    fin.close() ;
    return 0;
}