A can complete a piece of work in 60 days, B in 30 days, C in 20 days, D in 15 days, E in 12 days and F in 10 days. Now these 6 people make two groups, one of 2 members and the other of 4 members, in such a way that one team takes twice the time to complete the work as compared to the other team. If n such pairs of groups are possible, what is the value of (4n + 2)?
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