class Rule {
  w = '';
  l = '';
  
  prepare=function(w, l) {
    this.setWinner(w);
    this.setLoser(l);
  }

  setWinner=function(w) {
    this.w = w;
  }

  setLoser=function(l) {
    this.l = l;
  }

  winner=function() {
    return this.w;
  }

  loser=function() {
    return this.l;
  }
}

class Determination {
  rules = [];
  
  prepare=function(rules) {
    this.rules = rules;
  }
  
  winner=function(item1, item2) {
    let my_rule = new Rule();
    my_rule.prepare(item1, item2);
    
    let winner = null;
    for(let i=0; i<this.rules.length; i++) {
      rule = this.rules[i];;
      if(rule.winner() == my_rule.winner()) {
        if(rule.loser() == my_rule.loser()) {
          winner = rule.winner();
        }
      }
    }
    
    if(winner != null && winner != "") {
      return "Player 1 wins";
    }
    
    my_rule.prepare(item2, item2);
    for(let i=0; i<this.rules.length; i++) {
      rule = this.rules[i];;
      if(rule.winner() == my_rule.winner()) {
        if(rule.loser() == my_rule.loser()) {
          winner = rule.winner();
        }
      }
    }
    
    if(winner != null && winner != "") {
      return "Player 2 wins";
    }
    
    my_rule.prepare(item2, item1);
    for(let i=0; i<this.rules.length; i++) {
      rule = this.rules[i];;
      if(rule.winner() == my_rule.winner()) {
        if(rule.loser() == my_rule.loser()) {
          winner = rule.winner();
        }
      }
    }
    
    if(winner != null && winner != "") {
      return "Player 2 wins";
    }
    
    return "Draw";
  }
}

function makeRule(w, l) {
  rule = new Rule();
  rule.prepare(w, l);
  return rule;
}

function dumbRockPaperScissors(player1, player2) {
  rules = [
    makeRule("Scissors", "Paper"),
    makeRule("Rock", "Scissors"),
    makeRule("Paper", "Rock"),
  ];
  
  let determination = new Determination();
  determination.prepare(rules);
  return determination.winner(player1, player2);
}

const firstNonRepeatingCharacter = (str) => {
  alreadySeen = ""
    for (let i = 0; i < str.length; i++) {
        if(!str.substring(i+1, str.length).includes(str[i]) && !alreadySeen.includes(str[i])){
          return str[i];
        }
      
      alreadySeen += str[i];
    }
    return null; // return null if no unique character is found
};