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1. Implement a "hashing" function for 3-mer. That is, given a 3-mer, e.g., AAA, you should return an integer, e.g., 1. We take the natural order of sorted nucleotides, i.e., AAA -> 1, AAC -> 2, AAG -> 3, ..., TTT -> 64 as there are 64 possible combinations. Hint: Consider encode A, C, G, Tas [0, 1, 2, 3]. Then, a 3-mer can be considered as a 3-digit 4 based integer (Quaternary). For example, ATC would be a 4 based number "031" which can be converted to a number in decimal numerical system by: 0 * 4^2 + 3 * 411 + 1 * 4^0 = 13 Since we require the number starts from 1, you need to add 1 to the final results. Hence, you should return 14 in your function