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print("*** Problem 1 ***\n")
for i in [3, 1, 0, 2]:
    for j in range(0,i):
        print('A', end="")
    print('\nB', end="")
print("\n*** Problem 2 ***\n")
x = 9
while x > 6:
    print( (x%3)*"Z", end="")
    print(x)
    x = x - 1
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