Holiday Candle

Solve this holiday candle problem from GM Pal Benko before the light goes out!
Black to move and White mates in 3 Show Solution
[pgn]

[Event "?"]
[Site "?"]
[Round "?"]
[White "Holiday Candle by Pal Benko"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "5k2/8/5N2/5N2/5N2/5K2/5B2/5B2 b - - 0 1"]
[PlyCount "6"]
[EventDate "2015.??.??"]

1... Kf7 2. Bc4+ Kxf6 3. Be6 Ke5 (3... Kg5 4. Bh4#) 4. Bd4# *[/pgn]

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