Fast Fourier Transform, Algorithms, Pattern Matching, Convolution, Combination Sum.
for the letters. For e.g. ord(a) = 97. We are scaling the codes in the range 0 to 25 from 97 to 122 using the function H(). The coefficients b are such that the 1st coefficient b0 corresponds to the last letter in T, b1 corresponds to the 2nd last letter and so on. This is practically using the