Excel - change the last character in a cell in increasing alphabet down a column
Hi I want to change the last character in each cell in increase alphabet down a column, for example in a column I have
1234A
1234B
1234C
1234D
etc
How do I use a formula so that I can hold Ctr+Down to fill down the column while it automatically changes the last character in alphabetical order (A,B,C,D,E so on)?
Thanks!

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