INFB? - My Socionics Alternative to the Socionics Tricode (Aye Aye Aye)

Victor Gulenko's socionics book in English: https://www.amazon.com/dp/1696480094/ref=cm_sw_em_r_mt_dp_U_d5mMDb3SRPSH1 SiTx doesn't translate to SLI. But we can say ISTD (IST Delta in speech) is SLI.
The slide shows the Gulenko Social Mission name for each of the 16 sociotypes eg Seeker for ENTA ie NeTx.