https://school.programmers.co.kr/learn/courses/30/lessons/12915
python
def solution(strings, n):
return sorted(strings, key=lambda x: (x[n], x))
if __name__ == "__main__":
result = solution(["abce", "abcd", "cdx"], 2)
print(result)
['abcd', 'abce', 'cdx']