Tina and Joy have a few chocolates with them as shown. Who has more chocolates and by how much?
27. Kalyani and Sravani have some chocolates with each of them. If Kalyani gives Sravani four chocolates, Sravani will have twice the number of chocolates as Kalyani. Instead if Sravani gives Kalyani two chocolates, both of them will have equal number of chocolates with them. How many chocolates did Kalyani and Sravani have initially?