#include <cstdio>
#include <cstdlib>
#include <iostream>
#include <fstream>
#include <string>
using namespace std;

main(int argc, char **argv)
{
  string s;
  string arg2;
  int index_a, index_1, index_2;
  int line;

  if (argc != 3) {
    cerr << "usage: findthings string1 string2\n";
    exit(1);
  }

  arg2 = argv[2];

  line = 0;

  while (1) {
    getline(cin, s);
    if (cin.fail()) exit(0);
    line++;

    index_a = s.find('a');
    index_1 = s.find(argv[1]);
    index_2 = s.find(arg2);
    if (index_a == string::npos) {
      cout << "Line " << line << ": No character 'a'" << endl;
    } else {
      cout << "Line " << line << ": Character 'a' at index: " << index_a << endl;
    }
    if (index_1 == string::npos) {
      cout << "Line " << line << ": No string " << argv[1] << endl;
    } else {
      cout << "Line " << line << ": String " << argv[1] << " at index: " << index_1 << endl;
    }
    if (index_2 == string::npos) {
      cout << "Line " << line << ": No string " << argv[2] << endl;
    } else {
      cout << "Line " << line << ": String " << argv[2] << " at index: " << index_2 << endl;
    }
    cout << endl;
  }
}