Definition: In this task, you are given an input list A. You need to convert all the alphabets in the list with a number representing their position in the English alphabet. E.g., replace A by 1, B by 2, a by 1, b by 2, and so on.
Input: ['W', 'H', '6799', '1319', 'T', '6063', 'X', 'p', '9171', '4181', '6217', '7839', 't', 'a', 'n', '6303', 'c', 'a', 'o', '6967', '2951', '1147', 'n', 'R', '6187', '925', 'x', '6931', '3847', 'N', '8997', '9075', 'O', '6477', 'O', '1129', '863', '5069']

23, 8, 6799, 1319, 20, 6063, 24, 16, 9171, 4181, 6217, 7839, 20, 1, 14, 6303, 3, 1, 15, 6967, 2951, 1147, 14, 18, 6187, 925, 24, 6931, 3847, 14, 8997, 9075, 15, 6477, 15, 1129, 863, 5069