Which of the following terms will replace the question mark (?) in the given series?

LKC KMD? IQF HSG

JOE

     L    K    C

     12  11   3

     K    M    D

     11  13   4

  = -1  +2  +1

     10  15   5   

=   K    O    E

      I    Q    F

     9   17   6

     H    S    G

     8   19    7

1 is subtracted from the first letter, 2 is added to the second letter and 1 is added to the third letter.