how to automatically populate a cell?

R

RW

Say I have a 20 column wide spread sheet- columns 'A' ~ 'T'.

When I enter data into the cell at row 1 / column 'A', is there a way to
have that data automatically populate the cell at row 1 / column 'T'?

And if it can be done with cells, can it also be done with entire rows and
columns?
 
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