What will be the output of the following C++ code?

#include <iostream>
    using namespace std;
    int main()
    {
        int i;
        enum month 
        {
            JAN = 1, FEB, MAR, APR, MAY, JUN, JUL, AUG, SEP, OCT, NOV, DEC
        };
        for (i = MAR; i <= NOV; i++)
            cout << i;
        return 0;
    }

a) 01234567891011
b) 123456789101112
c) 34567891011
d) 123456789