The series consists of two alternating patterns. The first, third, fifth, etc., terms are 8, 14, 11, 14, 18 (which is inconsistent), but the second pattern (2nd, 4th, 6th...) is 2, 6, ?, 6, 12. However, looking at the sequence 8, 2, 14, 6, 11, 9, 14... the logic is +6, -8, +6, -8. 11-2 is not 9. Actually, the pattern is +6, -8, +6, -8, +6, -8. 11-2=9.