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def orders_are_sorted(take_out, dine_in, audit):
if len(take_out) + len(dine_in) != len(audit):
return False
i, j = 0, 0
for x in audit:
if i < len(take_out) and take_out[i] == x:
i += 1
elif j < len(dine_in) and dine_in[j] == x:
j += 1
else:
return False
return True
assert orders_are_sorted([1,3,5], [2,4,6], [1,2,4,3,6,5])
assert not orders_are_sorted([1,3,5], [2,4,6], [1,2,4,5,6,3])
assert orders_are_sorted([], [2,4,6], [2,4,6])
print("Success!")
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