Both hands will do. Take the left hand and say: the joint at the end of the middle finger is a mouse (1 year), the joint at the end of the index finger is a cow (6 years old), and the penultimate joint of the index finger is a tiger (1 1 year). And so on, circle your finger until the joint at the end of the ring finger is a pig. This is 12 Chinese zodiac. There is a difference of 5 years between each zodiac. My expression ability is poor, and the algorithm is difficult to express in words. My grandfather taught me when I was a child ... I still remember one or two things.