输入：num = "1432219", k = 3
Phospholipid scrambling at the endoplasmic reticulum is essential for establishing a dynamic equilibrium to maintain cellular homeostasis.
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Josh walks two hours into the city centre for a food parcel
Movie theatre operators and others in Hollywood had feared a Netflix takeover. It could have meant one of the last major studios - behind titles last year such as Ryan Coogler's Sinners, The Minecraft Movie and One Battle After Another - deserting the cinema.