transforming XML having column wise data into row wise table form using XSLT

I have below XML which is coming from client side , I need to transform that into table using XSLT. The data is coming Column wise and I need create a table by selecting first Column Data of every Column element and then second Column Data of every Column element and put that in <tr>.

Note : Element Columnn contains First , second , third column data Nested Element ColumnData contains row 1 .. row N data for each column.

<?xml version="1.0" encoding="utf-8"?>
<ColumnSet> /* This is group of all columns*/
  <Columnn value="ColumnName1" > /*This contains first column's rows*/
    <ColumnData value="R1C1"/> /*This is Row 1 of Column 1 */
    <ColumnData value="R2C1"/>  
  </Columnn>
  <Columnn value="ColumnName2" > /*This element has second column's all rows*/
    <ColumnData value="R1C2"/>
    <ColumnData value="R2C2"/>  
  </Columnn>
</ColumnSet>                  

I want to see the result in below form
ColumnName1      ColumnaName2
R1C1                 R1C2
R2C1                 R2C2

How do I accomplish this ?