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не было бы счастья, да несчастье помогло stresses
gen.	blessing in disguise; lucky strike (nicknicky777); a blessing in disguise
idiom.	cry all the way to the bank (Interex)
proverb	the darkest hour is nearest the dawn; the darkest hour is that before the dawn; it was a blessing in disguise (murad1993); there is no joy without alloy; what you lose on the swings, you gain on the roundabouts; who has never tasted bitter, knows not what is sweet; no great loss but some small profit; if it weren't for bad luck have no luck at all (Букв.: Если бы не неудача, не было бы и удачи. Rust71)
saying.	there would be no fortune, but misfortune helped (Ivan Pisarev)