I would like to filter the data according to the following criteria
First column is as follows for example I have the following barcodes
TCGA-3C-AAAU-10A-01D-A41E-01
TCGA-3C-AAAU-01A-11D-A41E-01
I want only barcode with 01A ( 4th value) not 10A
I have different barcodes but the 4th value is either 10A,11A or 01A
I want the ones with 01A
I have attached sample of the data, I have around 200,000 rows
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