Three-letter clusters: letters move +2, -2, +2

The same question, asked 2 times: 18 Sep 2025 S3*, 19 Sep 2025 S2. Every wording below, oldest first.

Try each one first, then open its answer.

Question 1
18 Sep 2025 S3
18 $What comes next? BYD, DWF, FUH, ?$
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Question 2
19 Sep 2025 S2
18 $What comes next? DZA, FXC, HVE, ?$
Tap an option to check your answer.