Demote header back to rows

[#1]

after you promote the header, sometime it required to demote back the header back to rows. 

to output back to the excel. 

input:

Country_Shop_Sales	UK_Shop1_James	UK_Shop1_Quuin	UK_Shop2_Jack	UK_Shop2_Don	US_Shop3_Kim	US_Shop3_Bob	US_Shop4_Kinston	US_Shop4_Hua
Sales Amount	1000	1010	1200	2043	2000	3000	4000	5000

output:

Field1	Field2	Field3	Field4	Field5	Field6	Field7	Field8	Field9
Country	UK	UK	UK	UK	US	US	US	US
Shop	Shop1	Shop1	Shop2	Shop2	Shop3	Shop3	Shop4	Shop4
Sales	James	Quuin	Jack	Don	Kim	Bob	Kinston	Hua
Sales Amount	1000	1010	1200	2043	2000	3000	4000	5000