spliting java string and adding characters at end and start of of alphanumeric
<p>I want to add a character at end and start of aplhanumeric in a string(max 8 characters). Any example will be great help to me in java</p>

<pre><code>String S1 = "xnXrmXWBidhksyn70rGyTH==QNujyRMdrQi8dO9X+RunER==LTy+K
mGI+KRCcRtmP5ehfR==";
</code></pre>

<p>I will add <code>a,b,c,d,e,f,g and h</code> at every end and start of aplhanumeric in above string and I want output as</p>

<pre><code> xnXrmXWBidhksyn70rGyTHa==bQNujyRMdrQi8dO9Xc+dRunERe==fLTyg+hK
mGI+KRCcRtmP5ehfR==
</code></pre>

<p>Please note that the string I will get will be dynamic and contains the non alphanumberic characters anywhere in the string.</p>
