title: Get appname from user-agent
body: <p>I have strings like</p>
  
  <pre><code>VK/28 CFNetwork/711.4.6 Darwin/14.0.0
  Mozilla/5.0 (iPhone; CPU iPhone OS 9_2 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13C75 Safari/601.1
  Instagram 8.2.0 (iPhone4,1; iPhone OS 8_4; ru_RU; ru; scale=2.00; 640x960)    AppleWebKit/420+
  Mozilla/5.0 (iPhone; CPU iPhone OS 9_2 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13C75 Safari/601.1
  </code></pre>
  
  <p>I want to know what is application were used to every string. It's </p>
  
  <pre><code>vk
  mozilla
  instagram
  mozilla
  </code></pre>
  
  <p>I find the way to determine browser, but how get app I don't know. </p>