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

['R', '5811', '8603', '8417', 'z', 'F', '3247', 'E', '1411', '6897', 'K', 'V', '7271', '1243', '5747', 'y', '5453']
18, 5811, 8603, 8417, 26, 6, 3247, 5, 1411, 6897, 11, 22, 7271, 1243, 5747, 25, 5453

['h', 'R', '5105', '6845', 'D', 'K', '8205', 'A', '6387', '6137', '7405', '3605', '1805', 'x', 'Q', '311', '8481']

8, 18, 5105, 6845, 4, 11, 8205, 1, 6387, 6137, 7405, 3605, 1805, 24, 17, 311, 8481