  The symmetric group S_n possesses a nontrivial central extension, whose
irreducible representations, different from the irreducible representations of
S_n itself, coincide with the irreducible representations of a certain algebra
A_n. Recently M.~Nazarov realized irreducible representations of A_n and Young
symmetrizers by means of the Howe duality between the Lie superalgebra q(n) and
the Hecke algebra H_n, the semidirect product of S_n with the Clifford algebra
C_n on n indeterminates.
  Here I construct one more analog of Young symmetrizers in H_n as well as the
analogs of Specht modules for A_n and H_n.
