How to insert blank row with variable input in next column

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Hello,
I want to insert the row based on the input value in next column, for example.

A 4
B 3
C 4
D 4
after A there should be 3 rows to be inserted after B 2 rows to be inserted after C 3 rows to be inserted like that. If i select the second column the macro has to insert the row based on the value in that column.