"White ,"said Fred.
Fred had a stain on his new white sweater,
Wong's laundry for removing stains ,there was no-one better.
Wong tried his best to remove the stain,
But gave up in the end,his efforts were in vain.
Wong rang his brother and asked him to give it a try,
But his brother too couldn't remove the dye.
Permanently stained and never to be white,
The moral--"Two Wongs cannot make a white."