" L, d, f, r" - too many.

“L、d、f、r”——太多了。

In the English language, as I'm sure you know, there are 21 consonant letters: like b, c, d, f, g, h, j, k, l and so on.

在英语中，我相信你知道，有21个辅音字母：像 b，c，d，f，g，h，j，k，l 等等。