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- #include <iostream>
- #include <string>
- using namespace std;
- int main()
- {
- string s;
- getline(cin, s);
- for(int i = 0; i < s.length(); i++)
- {
- if(s[i] == ' ')
- {
- s.insert(i, ",");
- i++;
- }
- }
- cout << s;
- }
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