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Election for the president of Erudite Academy takes place in two rounds. There are four candidates, named P, Q, R and S and total 100 voters. All the voters vote in both rounds of the elec on. In the first round, candidates P, Q, R and S get 23, 18, 39 and 20 votes respec vely, while in the second round they get 37, 31, 15 and 17 votes respectively.
Following points are known about the vo ng behavior of the voters: