In a code language, 'ko lin pa tu' means 'buy fresh vegetables daily', 'tu ra ko' means 'fresh milk daily' and 'ra sem pa' means 'buy milk now'. What is the code for 'vegetables'?

Explanation

1. 01

   'fresh' and 'daily' are both in the first two sentences, which share the codes 'ko' and 'tu'. We cannot tell which is which, but together they use up 'ko' and 'tu'.

2. 02

   'buy' is in the first and third sentences, which share only 'pa'.

3. 03

   In 'ko lin pa tu', removing 'ko', 'tu' and 'pa' leaves 'lin' for 'vegetables'.