# your code goes here
#Функція флатен
#0JLQsNGB0LjQu9C10L3QutC+INCQ0YDRgtC10Lwg
def Flatten(L):
for val in L:
if isinstance(val, list):
Flatten(val)
else:
print(val)
ar = [[3,2,1], 4, 5, [6, [7,8]], 9]
Flatten(ar)
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