Need assistance with command parameters.

[Mem5]

Words from a language dictionary?
If yes, I would:
1) extract all words starting from 't' or 'T' => use grep

Code:

# sample wordlist t.dic tabasco table

2) Combine these words to produce n-tuples of words (in your case "three or four words long", start with 3, then 4). Optionally, add a space or _ between two words (switch -j/-k);

Code:

# example with 2-words separated with '_' hashcat -a 1 -j '$_' --stdout t.dic t.dic | tee t2.dic tabasco_tabasco tabasco_table table_tabasco table_table

Code:

# example with 3-words separated with '_' hashcat -a 1 -j '$_' --stdout t.dic t2.dic tabasco_tabasco_tabasco tabasco_tabasco_table tabasco_table_tabasco tabasco_table_table table_tabasco_tabasco table_tabasco_table table_table_tabasco table_table_table

3) start hashcat against this new wordlist, straight attack.