In this series alternate groups form different series i.e. ATNHG, CVPJI, EXRLK and GZTNM are in one series and DKCMB, GNFPE and JQISH are in the second series.First Series:Pattern for the first letter:A⁺², C⁺², E⁺², GPattern for the second letter:T⁺², V⁺², X⁺², ZPattern for the third letter:N⁺², P⁺², R⁺², TPattern for the fourth letter:H⁺², J⁺², L⁺², NPattern for the fifth letter:G⁺², I⁺², K⁺², MSecond Series:Pattern for the first letter:D⁺³, G⁺³, J⁺³, MPattern for the second letter:K⁺³, N⁺³, Q⁺³, TPattern for the third letter:C⁺³, F⁺³, I⁺³, LPattern for the fourth letter:M⁺³, P⁺³, S⁺³, VPattern for the fifth letter:B⁺³, E⁺³, H⁺³, KHence, the next group in the series is MTLVK.