In a certain code language, 'It is dark outside' is coded as 'la sa ka tu', 'It is still raining' as 'sa la si ra', and 'Raining heavily outside' as 'va ha tu'. How are 'dark' and 'heavily' respectively coded?

'dark' is 'ka' and 'heavily' is 'ha'.

lines 1 and 2 share 'la' and 'sa' = It, is.

'outside' recurs in lines 1 and 3 as 'tu'.

in line 1 the leftover 'ka' maps to dark.

in line 3, with 'tu' = outside, the leftover 'ha' maps to heavily.