Seems right, what am I missing?

This is what I get, the solution seems to be right, but it still gives me a warning:

Anyone knows why?

line 11:

if summ1 > summ2:

It only returns summ1 if summ1 is larger than summ2.
Else it returns summ2

You should try using >= so that if summ1 is the same as summ2, it will return summ1.