A committee works for two years and is composed of 4 members each year, 2 of which are from the following 4 judges: F, G, H and I, and the other 2 members are from the following 3 scientists: V, Y and Z. Each year, the committee is chaired by one member. A member who chairs the first year must retire from the committee during the second year. The person who chairs the second year must be a member of the committee during the first year. The committee members must meet the following conditions: G and V cannot be members of the committee in the same year. H and Y cannot be members of this committee in the same year. Each year, only one of I and V is a member of this committee.
If V chairs the committee in the first year, I and Y must be members of the committee in the second year.