B-17G unlock - which planes count?

[The Globalizer]

The unlock for the B-17G is to win 50 Strike matches with a bomber -- which planes qualify as bombers? Any plane with a bomb loadout? Or are specific planes classed as bombers?

Can I double up some of the work on these with other planes' unlocks, like the IL-2 and IL-2M ground kills, Ju 87 D-3 Strike wins, etc.? All have bomb loadouts but seem to be in the hybrid bomber/fighter category (pilot-controlled gunners with more than token bombs capacity).

Thanks in advance for the help.