I am not sure this is even possible. Example will serve better than my long-winded explanation:

COL A is a number of varying length that can have duplicates in other rows. I sort by smallest to largest so duplicates stack on each other for easier viewing
COL B is a two character code of either TC or IN.

Current Data:
COL A COL B
4485402 IN
5164902 IN
5213901 IN
5213901 TC
5248001 IN
5345803 TC
5345803 TC
5345803 TC
5395501 TC
5468201 IN
5588206 IN
5674004 IN
5717903 IN
5900103 IN
5947110 IN
6230103 IN
6304005 IN
6444402 IN
6444402 TC
6557501 TC
6565805 IN
6565805 TC
6626801 TC
6666705 IN
6707901 IN
6777802 IN
6839904 IN
6839904 TC
6839904 TC
6839904 TC
6839904 TC
7086101 IN
7093204 IN
7109401 IN
7149609 IN
7301804 IN
7370904 TC

I am being asked to keep the rows with duplicates in COL A - keep BOTH rows BUT ONLY if one of the rows has IN and TC in COL B. So, COL A may have 3 or 4 or even 5 rows with duplicate numbers, but if all duplicates have a TC in COL B, I don't want any of them. I need only the 2 rows to remain - Duplicates in COL A and one of each, TC and IN in COL B.



Desired Result: Keep rows in GREEN, Remove rows in RED.
Current Data:
COL A COL B

4485402 IN
5164902 IN

5213901 IN
5213901 TC

5248001 IN
5345803 TC
5345803 TC
5345803 TC
5395501 TC
5468201 IN
5588206 IN
5674004 IN
5717903 IN
5900103 IN
5947110 IN
6230103 IN
6304005 IN
6444402 IN
6444402 TC
6557501 TC
6565805 IN
6565805 TC
6626801 TC
6666705 IN
6707901 IN
6777802 IN
6839904 IN
6839904 TC
6839904 TC
6839904 TC
6839904 TC
7086101 IN
7093204 IN
7109401 IN
7149609 IN
7301804 IN
7370904 TC

If there is someone able to help - words will not be able to express the gratitude...

Thanks for looking and FOR HELPING!!!!

(Oh - and the searching I did in this forum led me to a bunch of posts with 'code' in them - I have no idea how to use that - but I am willing to learn!) Thanks again!