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: ['2713', 'h', '4303', 'Z', '5281', '4635', 'G', 'u', '6719', 'm', '65', 's', '6595', '3443', 'l', '2347', '6785', 'd', 't', 'g', 'S', 'H', '3473', '1341', '5311', '6935', '6821', '8385', 'N', 'a', '7875', 'K', 'K', 'F', '1615', 'u']

2713, 8, 4303, 26, 5281, 4635, 7, 21, 6719, 13, 65, 19, 6595, 3443, 12, 2347, 6785, 4, 20, 7, 19, 8, 3473, 1341, 5311, 6935, 6821, 8385, 14, 1, 7875, 11, 11, 6, 1615, 21