Required the output which is mentioned in the attached file

Please help me where input is mentioned below and required output mentioned attached file.

Excel sheet containing column A & Column B values and it look like as below :

Column A Column B
1 aa
1 bb
1 cc
1 dd
1 ee
2 ab
2 ac
2 ad
3 aab
3 aac
3 aad
3 aae
3 aae

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