What will be the next letters in the following series?ACF, GIL, MOR, ???SUXSVZTUVSUV

The next letters in the series would be "SUZ".

Here's the step by step explanation:

1. Look at the first letter in each group: A, G, M. These letters are 6 places apart in the alphabet. So, the first letter of the next group should be 6 places after M, which is S.

2. Look at the second letter in each group: C, I, O. These letters are also 6 places apart in the alphabet. So, the second letter of the next group should be 6 places after O, which is U.

3. Look at the third letter in each group: F, L, R. These letters are 6 places apart in the alphabet. So, the third letter of the next group should be 6 places after R, which is Z.

So, the next group of letters in the series is "SUZ".