Find different characters in two strings
<p>How can i find different characters in the strings at same positions? Ex:</p>

<pre><code>String string1 = "Anand has 2 bags and 4 apples";
String n = /* ??? */;
String n2 = /* ??? */;
String string2 = "Anand has " + n + " bags and " + n2 + " apples";
</code></pre>

<p>I want <code>n = "2"</code> and <code>n1 = "4"</code>.</p>

<p>Please let me know how we can do this? (Space added between words only for clarity purpose . But i can not use Space as delimiter)</p>
