class Replacement:
def replaceSpace(self, iniString, length):
# write code here
url = ""
for s in iniString[:length]:
if s == " ":
url += "%20"
else:
url += s
return url
"""
以下代码不用写,直接提交,测试用例就会全部通过
while True:
try:
# a= input().split(',')
a = input().split(',')
b= a[0]
c= int(a[1])
print(Replacement().replaceSpace(b,c))
except:
break
"""

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