Traceback (most recent call last):
File "./prog.py", line 10, in <module>
File "./prog.py", line 7, in busca
File "./prog.py", line 7, in busca
File "./prog.py", line 7, in busca
[Previous line repeated 995 more times]
File "./prog.py", line 4, in busca
RecursionError: maximum recursion depth exceeded in comparison