Looking for a black cat

HR KS UL DA KS CB DH BD GM SF MK VM QR DU KM
BI DB GN DM FA NG AV FD NG MA KS TG HZ SU UE
RL NG NK SO BF AB RB SB PY CN HR DC GQ QR GO
NZ
Hint: This is a Playfair cipher containing the phrase "looking for a black cat."