import requests, re, collections
HDRS={"User-Agent":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 Chrome/126 Safari/537.36"}
def fetch(u):
try: return requests.get(u,headers=HDRS,timeout=20).text
except: return ""
def urls_from(x): return re.findall(r"\s*(.*?)\s*", x)
def expand(root, depth=0):
xml=fetch(root); locs=urls_from(xml)
if "