хихи

#include <iostream>
#include <regex>
#include <iterator>
#include <string>
using namespace std;

int main()
{
    int index = 0;
    string str;
    smatch result_1;
    smatch result_2;

    regex fit(R"(Merlin\\s*speaks)");
    regex avada(R"(Avada-ke-davra)");

    while (getline(cin, str))
    {
        index++;
        if (regex_search(str, result_1, fit))
         {
           cout << index << " ";
            if (regex_search(str, result_2, avada))
              cout << result_2.position() << endl;
         }
    }
}