What is the ticket window at Thane railway station littered with?

Newspaper pages? Wrappers for groundnuts? Train tickets? No. It's littered with bus tickets! Surprising, isn't it? But not on second thoughts. People come to the station by bus. They buy tickets in the bus and keep them in their shirt pockets. On reaching station, they walk to the ticket window. Take out money from their pockets to buy train tickets. Find that the bus tickets are still with them. Throw the bus tickets on the floor and give the money to the guy occupying the ticket window. Finally, there are hundreds of bus tickets scattered on the railway station!