Valli’s deepest desire was to ride on the bus she saw everyday. The sentences in the story which depict this are as follows:
“Day after day she watched the bus, and gradually a tiny wish crept into her head and grew there: she wanted to ride on that bus, even if just once. This wish became stronger and stronger, until it was an overwhelming desire.”
Valli's greatest wish was to take a bus ride. This is evident in the story through phrases like 'overwhelming desire', 'gazing longingly', 'fueling her desires', 'dreams' and 'hopes', and 'wish growing stronger with time'.