import re
tickers = ['EWZ US 05/29/20 C31','HSI US 12/30/20 C24900', 'SKG1C 24', 'S H1P 49']
rx = re.compile(r'\d+/\d+/\d+')
print( list(filter(rx.search, tickers)) )
aW1wb3J0IHJlCnRpY2tlcnMgPSBbJ0VXWiBVUyAwNS8yOS8yMCBDMzEnLCdIU0kgVVMgMTIvMzAvMjAgQzI0OTAwJywgJ1NLRzFDIDI0JywgJ1MgSDFQIDQ5J10KcnggPSByZS5jb21waWxlKHInXGQrL1xkKy9cZCsnKQpwcmludCggbGlzdChmaWx0ZXIocnguc2VhcmNoLCB0aWNrZXJzKSkgKQo=