$ q_3 = p_3 - 2 \le 8 - 2 = 6 $, but with $ q_1 \ge 1 $, $ q_2 \ge q_1 + 1 $, $ q_3 \ge q_2 + 1 $, and $ q_3 \ge q_1 + 2 $. With 3 variables, minimum span is 3 (e.g., 1,3,5). - Veritas Home Health