title: Regular Expression for no. of 0s and 1s odd in the string
body: <p>As we can develop regular expression like string ending with 01 over {0,1} 
  Like (0+1)*01</p>
  
  <p>So this way over {0,1} I want the answer of my question that what will be the regular expression for number of 0s and 1s both are odd</p>
  
  <p>Any combination of 1 and 0 should work.</p>