https://leetcode.com/problems/reorder-data-in-log-files/
class Solution:
def reorderLogFiles(self, logs: List[str]) -> List[str]:
letters, nums = [], []
for log in logs:
if log.split()[1].isdigit():
nums.append(log)
else:
letters.append(log)
letters.sort(key = lambda x: (x.split()[1:], x.split()[0]))
return letters+nums