#include <iostream>
#include <string>
#include <cctype>
using namespace std;
int main() {
string passCode;
passCode = "1 ";
if (isspace(passCode.at(0))){
passCode.replace(0, 1, "_");
}
if (isspace(passCode.at(1))){
passCode.replace(1, 1, "_");
}
cout << passCode << endl;
return 0;
}
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