I have the following dataset

It contains the hrs every staff has worked in each month.. Now my requirement is to segregate these people based on the hrs they worked over last 6 months.
I mean the people who worked for 00:00 to 10:00 hrs (low hrs) for the whole six months should be shown together, people who worked for 00:00 to 10:00 hrs for any 5 months should be shown together, people who worked for 00:00 to 10:00 hrs for any 4 months should be shown together and so on.
Attached the dataset for reference.