Brooklyn Nine-nine - Season 4- Episode 6 -

"Brooklyn Nine-Nine" → stay "Season" → maybe season "4" → stays as 4 (though 4 as a numeral is tricky; maybe four but "4" is the numeral) "Episode" → episode "6" → VI ?

But I need to ensure the numbers stay as is, but also can have ordinal forms. This might be complicated. Maybe the user wants numbers and ordinals left as is, just the words. But the instruction says "every word with 3 synonyms". So numbers like "4", "6", etc., since they are words in the text, but written as numerals. The user may expect that the numerals are converted into words with synonyms. Wait, but the original text has "6" as a numeral. If I convert "6" into "sixth", but the original is "Episode 6", then perhaps the user wants the numeral to stay as is. This is a bit ambiguous. Brooklyn Nine-Nine - Season 4- Episode 6

Let me proceed with the first sentence as a test. "Brooklyn Nine-Nine" → stay "Season" → maybe season