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.

['7469', 'F', 'f', 'O', 'X', 'A', 'j', 'u', '4763', 'o', '4451', 'S', '9469', '1779', '8089', 'D', 'n', 'R', 'm', '8465', '5865', '6759', 'Y', 'w', 'H', '5547', 'V', 'j', '3747', '3865', '549', 'r', '4383', '9179', '6307', '9723', 'J', 'p']
7469, 6, 6, 15, 24, 1, 10, 21, 4763, 15, 4451, 19, 9469, 1779, 8089, 4, 14, 18, 13, 8465, 5865, 6759, 25, 23, 8, 5547, 22, 10, 3747, 3865, 549, 18, 4383, 9179, 6307, 9723, 10, 16

['e', '7857', 'v', 'f', 'u', '1899', 'F', 'm', 'r', '3967', '6351', '7407', 'g', '3515', '5375', '621', 'o', '2239', 'm', 'j', 'i', 'I', 'r', '6435', '4887', '5847', '6375', 'w', '6839', '247', 'y', '8993', '1543', '3689', 'Y', '6383', '1401']
5, 7857, 22, 6, 21, 1899, 6, 13, 18, 3967, 6351, 7407, 7, 3515, 5375, 621, 15, 2239, 13, 10, 9, 9, 18, 6435, 4887, 5847, 6375, 23, 6839, 247, 25, 8993, 1543, 3689, 25, 6383, 1401

['h', 'v', 'i', 'O', '1665', 'k', 'K', '903', '6619', '4373', 'Q', '8537', 'T', '9119', 'B', '9023', '4639', '9345', '1781', '2513', 'f', '1619', '3245', 'P']

8, 22, 9, 15, 1665, 11, 11, 903, 6619, 4373, 17, 8537, 20, 9119, 2, 9023, 4639, 9345, 1781, 2513, 6, 1619, 3245, 16