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: ['B', '7657', '9043', '3333', 'k', 'p', 'D', '1643', '7083', 'Y', 'M', 'C', '501', '5963', 's', '1839', 'T', 'o', 'U', '575', '1713', 'U', '8665', 'R', 'Y', 'z', '8189', '4885', '4831', '2765', 'V', 'G', '1739', 's', 'J']

2, 7657, 9043, 3333, 11, 16, 4, 1643, 7083, 25, 13, 3, 501, 5963, 19, 1839, 20, 15, 21, 575, 1713, 21, 8665, 18, 25, 26, 8189, 4885, 4831, 2765, 22, 7, 1739, 19, 10