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empty_list = []
print(empty_list)
empty_list = list()
print(empty_list)

numbers = [10,20,30,40,50]
print(numbers)

mixed_list = [1,"apple", 3.5, True]
print(mixed_list)

print(numbers[0])
print(numbers[1])
print(numbers[2])

print(numbers[1:4])
print(numbers[:3])
print(numbers[2:])
print(numbers[::2])

print(len(numbers))

numbers.remove(30)
print(numbers)
numbers.append(70)
print(numbers)

values = [5,2,9,1,7]
values.sort()
print(values)
values.sort(reverse=True)
print(values)

text = "python is very powerful"
words = text.split()
print(words)

data = "10,20,30,40"
numbers = data.split(",")
print(numbers)

text = "I like Java"
new_text = text.replace("Java", "Python")
print(new_text)

words = ["Python", "is", "awesome"]
sentence = " ".join(words)
print(sentence)

numbers = ["1", "2", "3"]
result = "-".join(numbers)
print(result)

numbers_str = [1, 2, 3, 4]
numbers_int = list(map(str, numbers_str))
print(numbers_int)