#include<iostream>
#include <string>

using namespace std;
void insertComma(char *s);

int main()
{
    char newS[100];
    cin.getline (newS,100);
    insertComma(newS);
    cout << newS;
    system("pause");
    return 0;
}
void insertComma(char *s) {
    int j = 0;
    int size = strlen(s);
    char newS[100];
    for (int i = 0; i < size; i++, j++) {
        newS[j] = s[i];
        if (isspace(s[i]) != 0) {
            j++;
            newS[j] = ',';

        }

    }
    newS[j] = '\0';
    strcpy_s(s, strlen(newS) + 1, newS);
}