2018 KAKAO BLIND RECRUITMENT - 파일명 정렬 (Level 2)

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import re

def solution(files):
    files_proc = []
    for idx, file in enumerate(files):
        rst = re.match("([\D]*)([\d]{1,5}).*", file.lower())
        files_proc.append((rst.group(1), f"{rst.group(2):>05}", idx))
    return [files[idx] for _, _, idx in sorted(files_proc)]