rows = 5
i = 0
while i <= rows - 1:
j = 0
while j < i:
# display space
print('', end=' ')
j += 1
k = i
while k <= rows - 1:
print('*', end=' ')
k += 1
print()
i += 1
i = rows - 1
while i >= 0:
j = 0
while j < i:
print('', end=' ')
j += 1
k = i
while k <= rows - 1:
print('*', end=' ')
k += 1
print('')
i -= 1
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