Untitled

function isValidWalk(walk) {
  const limit = 10
  
  const score = {
    upDown: 0,
    leftRight: 0
  }
  
  walk.forEach((step) => {
    if (step === 'n') {
      score.upDown += 1
    }
    
    if (step === 's') {
      score.upDown -= 1
    }
    
    if (step === 'e') {
      score.leftRight += 1
    }
    
    if (step === 'w') {
      score.leftRight -= 1
    }
  })
  
  return score.upDown === 0 && score.leftRight === 0 && (walk.length / 4) < 10
}