Seagull spread - calls or puts for the bull spread?

I have read many things and somehow get it, but my question is
lets assume you have a long seagull spread and you can construct a bull spread using either calls or puts, how do you know that if you have to use calls or puts for the bull spread?

Are you talking about the bull spread that comprises the two lower strikes in the long (bullish) seagull?

If so, it can be calls or puts; it makes no difference.

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And, of course, you can build a long (or short) (bullish) seagull spread starting with an original (long) position in the underlying.

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yes i somehow managed to figure it out

thank you though