This formula is satisfiable because if we set to b to true and a to false, then the whole formula is true. All other assignments make the formula false, but it doesn't change that the formula is satisfiable as long as there is at least one assignment makes the formula true.
task_config = dict(
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在接下来目不暇接的新机潮里，有哪些打破常规的新形态首秀，又有哪些创新值得我们掏出钱包？
Being an integral figure in the distinguished history of Nigeria’s women’s team is an experience that will never dim in the mind of Jennifer Onyinyechi Echegini. Seven months on from beating the hosts Morocco in a pulsating Women’s Africa Cup of Nations final at Rabat’s Olympic Stadium, in the process winning a record 10th African title, “Joe”, as her Paris Saint-Germain teammates call Echegini – an acronym of her three initials – is yet to come down from her career high.