the performance of service by an individual as an employee, other than—

(A) service described in section 3121(b)(14)(B) performed by an individual who has attained the age of 18,

(B) service described in section 3121(b)(16),

(C) service described in section 3121(b)(11), (12), or (15) performed in the United States (as defined in section 3121(e)(2)) by a citizen of the United States, except service which constitutes “employment” under section 3121(y),

(D) service described in paragraph (4) of this subsection,

(E) service performed by an individual as an employee of a State or a political subdivision thereof in a position compensated solely on a fee basis with respect to fees received in any period in which such service is not covered under an agreement entered into by such State and the Commissioner of Social Security pursuant to section 218 of the Social Security Act,

(F) service described in section 3121(b) (20), and

(G) service described in section 3121(b)(8)(B);