The distressed animal had taken refuge from flowing waters beneath a footbridge, before the fire brigade's river rescue team arrived to save it.
what substrings does the regex (a|ab)+ match in the following input?
，更多细节参见safew官方下载
Путешествия для россиян стали еще дороже из-за конфликта на Ближнем Востоке20:37。谷歌浏览器【最新下载地址】对此有专业解读
time.sleep(random.uniform(，这一点在快连下载安装中也有详细论述