With counts of 1,2,3,4, alternate nostrils; 5 both nostrils6,7,8,9, alternate nostrils and 10 both nostrils; count up to 20/30--
1,1 (left nostril), 2,2 (right), 3,3 (left), 4,4 (right), 5,5 (both)
6,6 (left nostril), 7,7 (right), 8,8 (left), 9,9 (right), 10,10 (both)
11,11 (left nostril), 12,12 (right), 13,13 (left), 14,14 (right), 15,15 (both)
16,16 (left nostril), 17,17 (right), 18,18 (left), 19,19 (right), 20,20 (both)