Select the first character of the ERROR MESSAGE:

Responses:

(A-B)...
(C)...
(D-F)...
(G-I)...
(J-M)...
(N)...
(O)...
(P-Q)...
(R)...
(S)...
(T)...
(U-V)...
(W)...
(X-Z)...
Non-alphabetic...