What is the radical syllable of autumn?

Speech sequence

Refers to the case of the first letter of a syllable, in the order of Chinese Pinyin. It is usually used for word arrangement in dictionaries. Its sequence is: A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, W, X, Y, Z. V deletion (because it cannot be sequenced and read). However, in syllables, the vowel u can already be replaced by v.