list = list(range(20))

del list[1]

print(list)

list.remove(0)

print(list)

list.append(1)

print(list)

list.reverse()

print(list)

list.sort()

print(list)

list.insert(3,0)

print(list)

print(list.pop(4))
print(list)
print(list.count(0))
