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: ['7093', '9449', 'W', 'P', 'p', 'b', '7885', '4819', 'g', 'Y', 'o', '9307', '1889', 'M', '9231', 'U', '599', '4863', '845', '2619', '2271', '9415', '4847', '8891', 'c', 'f', '5207', '7479', 'U', '5597']

7093, 9449, 23, 16, 16, 2, 7885, 4819, 7, 25, 15, 9307, 1889, 13, 9231, 21, 599, 4863, 845, 2619, 2271, 9415, 4847, 8891, 3, 6, 5207, 7479, 21, 5597