anchor.diff:      var val = ev.target.value;
       var nums = this.state.nums.slice();
       var numsArr = val
  -      .replace(/\s/g, '')
  -      .replace(/[\+\*\-\//\(\)]/g, ',')
  +      .replace(/[\+\*\-\//\(\)\s]/g, ',')
         .split(',')
       var numsStatus = numsArr
         .reduce((acc, next, idx) => {
  
positive.code: header.App-header
    h1.App-header-heading math24
    button.App-header-generate(onClick=this.onGenerate) generate
    
  input.App-input(onChange=this.onChange autoFocus placeholder='Combine the numbers below to make 24')
  
  .App-nums
  
negative.code:     var className = isActive ? 'is-active' : ''
      .App-nums-num(className=className)= n
  
  var res = state.numsStatus && Object.keys(state.numsStatus).length && state.res || '-'
  var className = state.isCorrect ? 'is-active' : ''
  .App-result(className=className)= res