Given the obscure nature, I’ll answer:
Given the ambiguous nature, I think this is a cryptic instruction: is an anagram of "two by dy" = two by dy? dy = dysprosium. No. twbydy-am-by-3
The string appears to be a cryptic clue in the style of a cryptic crossword. Given the obscure nature, I’ll answer: Given the
But without more context, the cleanest match to a 3-letter "piece" is (as in a piece of something) — but the wordplay "twbydy" doesn't yield that. Given the obscure nature
But the simplest interpretation: = two-by-two = 4; "am" = AM; "by 3" = next to 3 → "4AM beside 3" → puzzle answer "TRI" (three) as the piece.