What is the output of this program?#include <iostream>

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What is the output of this program?

#include <iostream>
    #include <string>
    using namespace std;
    int main ()
    {
        string s ("Interview Mania");
        for (size_t k = 0; k < s.length();)
        {
            cout << s.at(k-1);
        }
        return 0;
    }

1. Interview
2. Mania
3. Interview Mania
4. Compilation Error
5. Runtime Error

Correct Option: E

terminate called after throwing an instance of 'std::out_of_range'
  what():  basic_string::at: __n (which is 18446744073709551615) >= this->size() (which is 15)
timeout: the monitored command dumped core
sh: line 1: 24994 Aborted                 timeout 10s main