There are seven people in ABCDEFG, A only works in the day shift and has one day off every week, G only works in the night shift and BCDEF everyone has one day off every week.

I don't know what your night shift and day shift are. . If it is not 12 hour. Then everyone has a day off. On G's rest day, the person who has a rest the day before can cover his night shift (A can't be arranged the day before), for example:

From Monday to Sunday, ABCDEFG is off, so G is off on Sunday, F is on the night shift and returns to the early shift on Monday. This F is equivalent to a day and a half off, but the next day will be less. If it's a class, it's 12 hours, otherwise it won't work overtime at night.

If it takes a long time or you have to work late at night, you can consider, for example, arranging a person to work casually on G's rest day (except A), and those who work on G's rest day will work night shift on G's rest day, arrange a rest the next day and work on the third day. . This becomes that the rest of the person is separated from Hugh. . . If it feels unfair, BCDEF will take turns once a week.