#include <iostream>
#include <string>
using namespace std;
int main() {
string aBinaryIPAddress = "0101100111101101";
size_t len = aBinaryIPAddress.size();
for (int i = 0 ; i != 4 ; i++) {
cout << "Digit " << i << ": " << aBinaryIPAddress.substr(len-4*(i+1), 4) << endl;
}
return 0;
}
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