I need to check each word to see if it has at least three synonyms. Let's take "offers" first. Synonyms could be provides, presents, offers. Wait, "offers" is the original word here. Maybe "provides" or "presents" can be alternatives. "Advantages" can be benefits, perks, advantages. "Portability" could be mobility, transportability, portability. Hmm, transportability might not be a common synonym. Let me confirm: "portability" synonyms are indeed mobility, transportability, and maybe portability? Alternatively, maybe "mobility" and "portability" are the main ones. The user wants three. Maybe "portability, transportability, and ease of movement"? That seems forced. Maybe "portability, transportability, and mobility"? Hmm.
Next sentence: "The letters were written by Prabhakar over a period of several decades, from the 1940s to the 1980s." "Written" again, maybe use a different synonym here. "Decades" could be "periods|eras|time frames". The dates stay the same. na pathavlele patra pdf
I'll continue this process for each word. I need to make sure that for each word, the three variants are grammatically correct and fit the context. Words like "dominant" could become "primary", "central", "predominant". "Testament" might be "evidence", "proof", "example". I need to check each word to see