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: ['6901', '1759', 'W', '9097', '859', '3789', '9455', 'q', '2115', '2327', 'C', '7197', '4215', 's', 'l', 'j', 'U', 's', '1273', '9171', 'S', 'p', '2089', '921', 'K', '4267', 'E', '3301', 'E', 'R', 'j', 'p', '7953', 'g', 'V', 'w', 'i', 'C']

6901, 1759, 23, 9097, 859, 3789, 9455, 17, 2115, 2327, 3, 7197, 4215, 19, 12, 10, 21, 19, 1273, 9171, 19, 16, 2089, 921, 11, 4267, 5, 3301, 5, 18, 10, 16, 7953, 7, 22, 23, 9, 3