def add_ing_or_ly(str):
if len(str) >= 3:
if str.endswith("ing"):
str += "ly"
else:
str += "ing"
return str
print(add_ing_or_ly('python'))
print(add_ing_or_ly('xyz'))
print(add_ing_or_ly('ab'))
print(add_ing_or_ly('ping'))
'''
run:
pythoning
xyzing
ab
pingly
'''