title: Split mixed string into columns in R
body: <p>A newbie to textmining analysis and R coding. </p>
  
  <p>I have 200 genes with mixed string. I want to split them and paste strings (eg, cadherins, orphan receptors) in one column and numbers (eg, 2/3), number+string (eg, 7D, 7TM) in another column. 
  I used strssplit to split the words. Please any suggestion on how to parse them would be helpful.  </p>
  
  <pre><code>example:
   &gt; Genes &lt;- c("7D cadherins", "7TM orphan receptors", "7TM orphan receptors RNA18S", "28S ribosomal RNAs  RNA28S", "45S pre-ribosomal RNAs  RNA45S", "5.8S ribosomal RNAs", "Actin related protein 2/3 complex”)
  
  Expected result(2nd and 3rd column):
  
  7D cadherins        cadherins       7D 
  7TM orphan receptors        orphan receptors        7TM   
  18S ribosomal RNAs  RNA18S  ribosomal RNAs  RNA18S  18S RNA18S
  28S ribosomal RNAs  RNA28S  ribosomal RNAs  RNA28S  28S  RNA28S
  45S pre-ribosomal RNAs  RNA45S  pre-ribosomal RNAs      45S  RNA45S
  5.8S ribosomal RNAs ribosomal RNAs  5.8S
  Actin related protein 2/3 complex   Actin related protein complex    2/3 
  </code></pre>