Добавление в два списка

var button = document.getElementById('button'); 
button.addEventListener('click', handle); 
 
function handle() { 
 
  var input = document.getElementById('input'); 
  var textElem = input.value; 
 
  var first = document.getElementById('first'); 
  var second = document.getElementById('second'); 
 
  var elem = document.createElement('li'); 
  elem.innerHTML = textElem; 
 
  first.appendChild(elem); 
  second.appendChild(elem); 
 
};

body { width: 250px; } 
#first { float: left; color: red; } 
#second { float: right; color: green; }

<input type="text" id="input" placeholder="Enter text"> 
<button id="button">Submit</button>   
<ul id="first"></ul> 
<ul id="second"></ul>