In a certain code language, 'ri ti gi' is written as 'Usha playing cards', 'si ni gi' is written as 'Asha playing tennis' and 'ri si wi' is written as 'cards and tennis'. What is the code for the word 'tennis' in that language?
एक निश्चित कूट भाषा में, 'ri ti gi' को 'Usha playing cards' लिखा जाता है, 'si ni gi' को 'Asha playing tennis' लिखा जाता है और 'ri si wi' को 'cards and tennis' लिखा जाता है। उस भाषा में 'tennis' शब्द का कूट क्या होगा?