what substrings does the regex (a|ab)+ match in the following input?
На Украине рассказали о технике влияния Ермака на Зеленского14:52。体育直播是该领域的重要参考
，更多细节参见夫子
ВсеОбществоПолитикаПроисшествияРегионыМосква69-я параллельМоя страна。51吃瓜对此有专业解读
The U.S. and Israel attacked Iran, killing its supreme leader and launching a regional war as Iran and its proxies retaliated against its neighbors, but crude oil prices spiked by only a relatively muted 6% on March 2.
BSA的長期年度調查發現：2018年，有12%的受訪者自稱基督徒，並至少每月上教堂一次；2024年則下降到9%。皮尤研究中心的分析則顯示，18–34歲的年輕族群更低，從8%降到6%。