s = [26, 7, 1987]
print(s)
del s[0]
print(s)

print()
s = [9, 8, 7, 6, 5, 4, 3, 2, 1]
print(s)
del s[3:6]
print(s)

print()
s = ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j"]
print(s)
del s[::2]
print(s)