Why is my second letter considered a miss? For example my word is "treehouse" any time I write "r" it counts a miss.

class Game {
  public static final int MAX_MISSES = 7;
  private String answer;
  private String hits;
  private String misses;

  public Game(String answer){

    this.answer = answer;
    hits = "";
    misses = "";

  }

  public boolean applyGuess(char letter){

    boolean isHit = answer.indexOf(letter) != 1;
    if (isHit) {
      hits += letter;
    }else{
      misses += letter;
    }
    return isHit;
  }

  public int getRemainingTries(){
    return MAX_MISSES - misses.length();
  }

  public String getCurrentProgress() {
    String progress = "";
    for (char letter : answer.toCharArray()){
      char display = '-';
      if(hits.indexOf(letter) != -1){
        display = letter;
      }
      progress += display;
    }
    return progress;
  }


}

import java.util.Scanner;

class Prompter{
  private Game game;

  public Prompter(Game game) {
    this.game = game;
  }

  public boolean promptForGuess(){
    Scanner scanner = new Scanner(System.in);
    System.out.print("Enter a letter:  ");
    String guessInput = scanner.nextLine();
    char guess = guessInput.charAt(0);
    return game.applyGuess(guess);
  }

  public void displayProgress(){
    System.out.printf("You have %d tries left to solve: %s%n",
                      game.getRemainingTries(),
                      game.getCurrentProgress());
  }

}

public class Hangman {

  public static void main(String[] args) {
    // Your incredible code goes here...
    Game game = new Game("snow");
    Prompter prompter = new Prompter(game);
    while(game.getRemainingTries() > 0){
      prompter.displayProgress();
      prompter.promptForGuess();
    }
  }
}