Concept:The second term is formed by taking the opposite letter of each letter in the first term.Explanation:For WUS, letter positions are W=23, U=21, S=19.Opposite positions use 27−position: 27−23=4, 27−21=6, 27−19=8.These are D, F, H, so WUS:DFH.Apply the same rule to MKI: positions are M=13, K=11, I=9.Opposite positions are 27−13=14, 27−11=16, 27−9=18.These letters are N, P, R.So the required term is NPR.