A gold medal carries 5 points, while silver and bronze medals carry 3 and 2 points, respectively. Both P and Q have won 3 golds, while R and S have won 1 and 2 golds, respectively. Each of the four has won 2 silver medals. P, Q. R and S won 5, 3, 0 and 7 bronze medals, respectively. Which pair has the least difference in their points?