I have Data which is like
a 1
a 2
a 3
b 1
b 2

This I would like to regroup this as following
a 1 2 3
b 1 2 and so on.
Issue is -
Number of times a .... appears is not fixed.
Number of unique ä,b in column is not fixed
All data is text only, as an example I used numbers here.
Help appreciated. Thanks.