"""
출처:프로그래머스,
https://school.programmers.co.kr/learn/courses/30/lessons/181866

"""
# 풀이 과정
def solution(myString):
    k=myString.split("x")
    result=[]
    for x in k:
        if x=='':
            continue
        else:result.append(x)
    answer = result
    answer.sort()
    return answer