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: ['m', '1433', 'j', 'R', '4445', '4609', '6155', '711', 'J', 'o', 'F', '4341', 'K', '9301', '9361', 's', '2791', '9305', 'S', 'V', '4059', '463', '1557', '8609', '2467', 'o', 'u', '6537']

13, 1433, 10, 18, 4445, 4609, 6155, 711, 10, 15, 6, 4341, 11, 9301, 9361, 19, 2791, 9305, 19, 22, 4059, 463, 1557, 8609, 2467, 15, 21, 6537