title: Time difference of 14 digit date YYYYmmDDHHMMSS
body: <p>I need a Unix script which i can find the time difference between 2 times look like  YYYYmmDDHHMMSS </p>
  
  <p>Example</p>
  
  <p>T1=20120624192555</p>
  
  <p>T2=20120624204006</p>
  
  <p>So the time difference will be =1:14:11</p>
  
  <p>Any clue?</p>