text: const string = process.argv[2];
  if (!string) return console.log("Please provide a string.");
  
  chars_counter = {};
  
  for (const char of string) {
      if (!chars_counter[char]) chars_counter[char] = 0;
      chars_counter[char] += 1;
  }
  
  for (const char_count of Object.entries(chars_counter)) {
      if (char_count[1] >= 2) {
          console.log(
              `Character: ${char_count[0]}, Occurrences: ${char_count[1]}`
          );
      }
  }
  