Need Help on XSLT Code

Hi Experts,

I am working existed interface which had developed on XSLT code.

here i need to edit few changes, can anyone please help.

here is the requirement.

Input:

<ABC>.123.345.567.789</ABC>

Output:

<A>

  <xyz>.123</xyz>

</A>

<A>

  <xyz>.123.345</xyz>

</A>

<A>

  <xyz>.123.345.567</xyz>

</A>

<A>

  <xyz>.123.345.567.789</xyz>

</A>

Thanks in Advance.

Thanks & Regards,

Maheswarareddy