Here, "The" is a three-letter word. Replace with this since "these" might be a bit off, but maybe that but "the" is in the original. Wait, the user said to replace each three-letter word with three alternatives. So for "The", possible alternatives could be that but need to check context.
Original sentence structure: "The [Kalnirnay...] PDF: A... Resource for..." So replacing "The" with synonyms. Maybe "That", "This", "Such". kalnirnay 1986 marathi calendar pdf
First sentence: "Downloading the Kalnirnay 1986 Marathi Calendar PDF is a straightforward process." Here, "The" is a three-letter word
