How good or less is the horoscope in the zodiac?

First of all, this question is put forward by laymen. Eight characters are words composed of eight branches, and there is no problem of more or less. The eight-character is a common name, and the formal name is four pillars, namely, the four symbols of year, month, day and time, which are composed of heavenly stems and earthly branches. For example, 29 is the ugly year. Since ancient times, China people have used cadres and branches to mark the years, months, days and times, such as Jiazi Year, Ugly Moon, Bingyin Day and Dingmao Time. There are ten heavenly stems * * *: A, B, C, D, E, G, N and D, and twelve earthly branches * * *: Zi Chou Yin Mao Tatsumi Shen You Xu Hai at noon. The least common multiple of ten and twelve is sixty, and the aerial stems in odd positions can only be matched with the earthly branches in odd positions, so that each aerial stem can be matched with six earthly branches, and ten aerial stems can be matched with sixty groups, which is called "sixty flowers". Once everyone is born, his or her horoscope is also decided. The eight characters must be four heavenly stems and four earthly branches and one * * * eight characters. How can there be more or less eight characters? The person who raised this question is a complete layman to traditional culture!