""""
displays all of the odd numbers between
1 and 20 with a space between each one.
"""

for i in range(1, 21, 2):
    print(i, end=' ')
print()

for x in range(0, 101, 10):
    print(x, end=' ')
print()

for y in range(20, 0, -1):
    print(y, end=' ')
print()