In a certain code language, 'per piece rate' is written as 'uot eot kot', 'per capita income' is written as 'zot yot uot', and 'income is necessary' is written as 'mot zot sot'. What is the code for the word 'capita' in this language?

Let's identify the unique code for the word 'capita' by comparing the sentences: 'per piece rate' $\to$ 'uot eot kot''per capita income' $\to$ 'yot uot zot''income is necessary' $\to$ 'mot zot sot'Comparing sentence (1) and sentence (2): The common word is 'per' and the common code is 'uot'. Therefore, 'per' $\to$ 'uot'.Comparing sentence (2) and sentence (3): The common word is 'income' and the common code is 'zot'. Therefore, 'income' $\to$ 'zot'.Now looking at sentence (2): The words left are 'capita' and the remaining code is 'yot'.Hence, 'capita' $\to$ 'yot'.