There is a special form for boolean formulas called "Conjunctive Normal Form" (CNF). A problem in this form consists of clauses connected with and operators, where each clause only contains variables connected with or operators. The variables can appear negated, but only variables can be directly negated, something like !(a && b) is not allowed. An example boolean formula in CNF form is:
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that actually did the accounting.
远处有人开始“拜天公”，烟花声突然密起来，家里的窗玻璃轻轻震了一下。阿爸抬头看了一眼天，又低头摆筷子，招呼我和阿妈赶紧吃饭。
Гангстер одним ударом расправился с туристом в Таиланде и попал на видео18:08