In a certain coded language, Best way to win is written as bau mau shau sa; The way to hell is written as tau mau sa hau; Win of the day is written as shau fau tau dau. What is the code for hell in this language?

The code for hell is hau.

Comparing sentences 1 and 2, way and to share the codes mau and sa.

Comparing sentences 1 and 3, Win shares the code shau.

Comparing sentences 2 and 3, the shares the code tau.

In sentence 2 the four codes are tau, mau, sa, hau, and tau, mau, sa go to the, way, to.

The leftover code hau matches hell.