If 10,966 people voted for a politician in his first election, 14,952 voted for him in his second election, and 8,720 voted for him in the first and

If 10,966 people voted for a politician in his first election, 14,952 voted for him in his second election, and 8,720 voted for him in the first and second elections, how many people voted for this politician in the first or second election?