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function movePiece(startStack, endStack) {
  // Your code here, gives the move a variable 
  let currentPiece = stacks[startStack].pop();
  // add current piece to end stack
    stacks[endStack].push(currentPiece)
}

function isLegal(startStack, endStack) {
  // need to add something it can check
  const legalMove = ["a", "b", "c"];

  if(legalMove.includes(startStack) == false || legalMove.includes(endStack) == false)
  {
    return false;
  }

  //empty stack means move is legal
  if(stacks[endStack].length == 0)
  {
    return true;
  }

  //if piece is larger move is legal
  else if(stacks[startStack].slice(-1) < stacks[endStack].slice(-1))
  {
    return true;
  }
  else 
  {
    return false;
  }

}

function checkForWin(startStack, endStack) {
  // checking to win
  if( stacks.b.length === 4 || stacks.c.length === 4)
  {
    console.log("You've won!!!!")
    return true;
  }
  else 
  {
    return false;
  }

}

function towersOfHanoi(startStack, endStack) {
  // Your code here
  if(isLegal(startStack, endStack) == true)
  {
    movePiece(startStack, endStack)
  }
  else
  {
    console.log("YOU SHALL NOT PASS!!")
  }
  checkForWin();
  
}