문제 링크

정답 :

def solution(myString):
    myString = list(myString)
    
    for idx, i in enumerate(myString):
        if ord(i) < ord('l'):
            myString[idx] = 'l'
    
    return ''.join(myString)

방법 1:

def solution(myString):
    return myString.translate(str.maketrans('abcdefghijk', 'lllllllllll'))

방법 2:

def solution(myString):
    answer = ''
    for i in myString:
        if i < "l":
            answer+='l'
        else: 
            answer+=i
    return answer