Which letter-cluster will replace the question mark (?) to complete the given series?

XHFM, TEDL, PBBK, ?, HVXI

LYZJ

Explanation:

XHFM, TEDL, PBBK, ?, HVXI

The logic followed here is :

X → (-4) → T → (-4) → P → (-4) → L → (-4) → H

H → (-3) → E → (-3) → B → (-3) → Y → (-3) → V

F → (-2) → D → (-2) → B → (-2) → Z → (-2) → X

M → (-1) → L → (-1) → K→ (-1) → J → (-1) → I

So, the letter-cluster that replaces the (?) to complete the series is "LYZJ"