print('Exemplo 1:')
for i in range(5):
    print(i)
print()

print('Exemplo 2:')
for i in range(12, 16):
    print(i)
print()

print('Exemplo 3:')
for i in range(0, 10, 2):
    print(i)
print()

print('Exemplo 4:')
for i in range(5, -1, -1):
    print(i)

