If the volume of the parallelopiped with coterminous edges $4\overline{\mathrm{i}}+5\overline{\mathrm{j}}+\overline{\mathrm{k}}, -\overline{\mathrm{j}}+\overline{\mathrm{k}} \mathrm{and} 3\overline{\mathrm{i}}+9\overline{\mathrm{j}}+\mathrm{p}\overline{\mathrm{k}}$ is 34 cubic units, then p =