f = lambda x, y: str(int(x[::-1]) + int(y[::-1]))[::-1]
f("123", "1235")

ddff86de8bd943127b7a4ce09d3cc8c17024fe41
<mask token>

<mask token>
f('123', '1235')

f = lambda x, y: str(int(x[::-1]) + int(y[::-1]))[::-1]
f('123', '1235')

f = lambda x, y: str(int(x[::-1]) + int(y[::-1]))[::-1]
f("123", "1235")
