As usual, the cache is not at the given co-ordinates. I suspect this one will be obvious to some…
A = Dean + Roger
B = Fred + Michael + Todd
C = (Dean - Fred) - Todd
D = Fred - Todd
E = Todd + Dean
F = Roger + Michael
G = Todd + Fred + Dean
H = Michael + Todd + Dean
N 50 4A.BCD W 000 2E.FGH
Pbapergr Cbfg. Urnq urvtug (zvar naljnl!) Qba'g sernx bhg...