[프로그래머스] 외계행성의 나이 - python

https://school.programmers.co.kr/learn/courses/30/lessons/120834

프로그래머스

def solution(age):
    alphabet = 'abcdefghij'
    answer = ''
    age_list = list(map(int,str(age)))
    for i in range(len(age_list)):
        answer += alphabet[age_list[i]]
    return answer