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: ['7603', 'p', '8223', 'F', 'z', '297', '3417', '3181', '877', 'i', '7763', 'R', '8003', 'J', 'l', 'F', 'F', '4667', 'b', 'Z', '7623', '3769', '3741', '3629', '9789', '501', '3295', '5007', 'e', '1211', '2715', 'p']

7603, 16, 8223, 6, 26, 297, 3417, 3181, 877, 9, 7763, 18, 8003, 10, 12, 6, 6, 4667, 2, 26, 7623, 3769, 3741, 3629, 9789, 501, 3295, 5007, 5, 1211, 2715, 16