how can it be performed
how to filterr data
i have two list in the same column A

1
2
3
.
.
.
m

1
2
.
.
.
n

Now i want a single list that in column B: if m=4 & n=3 then

1
2
3
4
1
2
3

is it possible?
I do not have ever used filter or abvanced filter