Load flat files into target

I have a query in Informatica i.e
I have 3 flatfiles and 3 targets(t1,t2,t3)
My requirement is .....
1st row to load into 1st target
2nd row to load into 2nd target
3rd row to load into 3rd target
4th row to laod into 1st target
5th row to load into 2nd target
6th row to load into 3rd target
..
..
..

If anyone can have idea how to do it...
plz give the answer

Thanks
Fazululla Shaik

create a router transformation define 3 groups for 3 output, in session properties create a partitions on the router in Round robin base, try it ok
:)