In a meeting, guests are offered milk, tea or coffee.
Seven of the attendees do not drink tea.
Six of them do not drink milk.
Five of them do not drink coffee.
Four of them drink neither tea nor milk.
Three of them drink neither coffee nor tea.
Two of them drink neither milk nor coffee.
One of them does not drink any of the drinks.
None of the attendees drink all three drinks.
How many people are there at the meeting?
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