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grep 'Normal' DNA_DATA.csv | grep ',[ATCG]*C,'

grep -E 'JOHN MARKO|PARTH DESAI' DNA_DATA.CSV | grep -E '2025-05-(2[0-9]|3[0-1])'

grep -E 'POLYETHYLENE GLYCOL' DNA_DATA.csv | grep -E 'AAA|CCC|GGG|TTT'