#include <string>
#include <iostream>

using namespace std;

int main() {
  string foo( "my cat's breath smells like catfood after it eats food.");
  size_t first;

  first = foo.find_first_of( "food");

  while (first != string::npos) {
    cout << first << " " << foo[first] << endl;
    first = foo.find_first_of( "food", ++first);
  }

  return 0;
}