here comes the bride or o tannenbaum

Here's how to play my new game 'Here Comes the Bride' or 'O Tannenbaum'?:

• Whistle or sing the first four notes of (your choice) "Here Comes the Bride" or "O Tannenbaum."
• The other person guesses which one it is.
• Then you tell them whether they guessed right.

EXAMPLE
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Barry: ♩♩♪♩
Cate: ... "Here Comes the Bride?"
Barry: Wrong again. It's O Tannenbaum.
Cate: Dang it!