import re
slist = ["-args", "-111111", "20-args", "20 - 20", "20-10", "args-deep"]
nlist = list()
for estr in slist:
nlist.append(re.sub(r"-(?=[a-zA-Z])", " ", estr).lstrip())
print (nlist)
aW1wb3J0IHJlCnNsaXN0ID0gWyItYXJncyIsICItMTExMTExIiwgIjIwLWFyZ3MiLCAiMjAgLSAyMCIsICIyMC0xMCIsICJhcmdzLWRlZXAiXQpubGlzdCA9IGxpc3QoKQpmb3IgZXN0ciBpbiBzbGlzdDoKICAgIG5saXN0LmFwcGVuZChyZS5zdWIociItKD89W2EtekEtWl0pIiwgIiAiLCBlc3RyKS5sc3RyaXAoKSkKcHJpbnQgKG5saXN0KQ==