XSLT to flatten XML(has repeating elements)

I need to flatten an XML using XSLT. Below is the XML

<Parent>

<Child type="X">
  <data value="1"/>
  <data value="2"/>
  <data value="3"/>
</Child>

<Child type="Y">
  <data value="5"/>
  <data value="6"/>
  <data value="7"/>
  <data value="8"/>
</Child>

</Parent>

Desired output

<Parent>
<Child type="X" data1_value="1" data2_value="2" data3_value="3"/>
<Child type="Y" data1_value="5" data2_value="6" data3_value="7" data4_value="8"/>
</Parent>

Thanks in advance!