From the left end, the letters are replaced alternately with the third succeeding letter and the immediately preceding letter as per the English alphabetical order. For ‘MAGIC’ M + 3 = P A – 1 = Z G + 3 = J I – 1 = H C + 3 = F For ‘STRONG’ T + 3 = W O – 1 = N P + 3 = S P – 1 = O E + 3 = H R – 1 = Q. For ‘HANGER’ H + 3 = K A – 1 = Z N + 3 = Q G – 1 = F E + 3 = H R – 1 = Q.
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