s1 = "Qazaqstan-2030"
# "2030" бөлігін "2050" бөлігіне ауыстыру
result = s1.replace("2030", "2050")
# Нәтижені баспаға шығару
# print(result)
CnMxID0gIlFhemFxc3Rhbi0yMDMwIgoKIyAiMjAzMCIg0LHTqdC70ZbQs9GW0L0gIjIwNTAiINCx06nQu9GW0LPRltC90LUg0LDRg9GL0YHRgtGL0YDRgwpyZXN1bHQgPSBzMS5yZXBsYWNlKCIyMDMwIiwgIjIwNTAiKQoKIyDQndOZ0YLQuNC20LXQvdGWINCx0LDRgdC/0LDSk9CwINGI0YvSk9Cw0YDRgwojIHByaW50KHJlc3VsdCk=