https://programmers.co.kr/learn/courses/30/lessons/12915
def solution(strings, n):
answer = []
for s in range(len(strings)):
strings[s]=strings[s][n]+strings[s]
strings.sort()
for s in strings:
answer.append(s[1:])
return answer
def strange_sort(strings, n):
return sorted(strings, key=lambda x: x[n])