If STUMP is coded as PQRJM, then PITCH is coded as:

Key idea: replace each letter by the letter three positions earlier in the alphabet.

• P → M (P - 3 = M)

• I → F (I - 3 = F)

• T → Q (T - 3 = Q)

• C → Z (C - 3 = Z, wrap around the alphabet)

• H → E (H - 3 = E)

Encoded word: MFQZE