How do I separate K562 and GM12878 in KG-0210-PL1 scRNA-seq file

[gmurtaza404]

Hello, I am trying to reproduce some of the results from the paper. I am currently trying to separate all cell line datasets. I have been able to follow the instructions in the supplementary section to segregate K562-NIH3T3 mixture and process the MDS-L datasets. Currently I am unable to segregate GM12878 cells from the K562/GM12878 mixture. The details in the supplementary section suggests that they were segregated based on their "first round barcodes", how do I access these first round barcodes, and how do I get the mapping of these barcodes to cell lines?

Thanks!