In a code language, 'day of rest' is written as 'per din ces', 'rest after work' is written as 'per fin tds', 'all day work' is written as 'din fin mls'. What is the code for the word 'after' in this language?

tds

Given; In a code language, 'day of rest' is written as 'per din ces', 'rest after work' is written as 'per fin tds', 'all day work' is written as 'din fin mls'.

So,

DAY OF REST  =  PER DIN CES

REST AFTER WORK  =  PER FIN TDS

ALL DAY WORK  =  DIN FIN MLS

Thus, AFTER is coded as TDS