#include <cstdio>
#include <iostream>
#include <algorithm>
using namespace std;

char ch;

int main(){

while(ch == getchar()){
    if(ch == '\n' || ch == EOF) break;
    if(ch == ',') printf(" ,");
    else if(ch != '-' && ch != '.') printf("%c", ch);
}printf("\n");

return 0;
}