% UNSATISFIABLE
PEOPLE = {A, B, C, D};

%               A, B, C, D
preferences = [|4, 1, 2, 3,|  % A
                2, 4, 1, 3,|  % B
                1, 2, 4, 3,|  % C
                1, 2, 3, 4,|]; % D