If I have this input
3
2 3
3 4
5 4

Is there any difference between outputing
5 4     3 4
3 4 and 5 4
2 3     2 3

> If I have this input
> 3
> 2 3
> 3 4
> 5 4
>
> Is there any difference between outputing
> 5 4     3 4
> 3 4 and 5 4
> 2 3     2 3
Bubble sort works following way:
while (exists A[i] and A[i+1] such as A[i] < A[i+1]) do
   Swap(A[i], A[i+1]);

So, the correct output is
3 4
5 4
2 3