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.

['3415', 'V', 'b', 'y', 'D', '345', '3149']
3415, 22, 2, 25, 4, 345, 3149

['i', '5103', '9407', '6703', 'q', 'W', 'y', '2667', '1847', '2019', 'Z', '6393', '2369', 'i', '3965', '3439', 'y', '4237', 'e']
9, 5103, 9407, 6703, 17, 23, 25, 2667, 1847, 2019, 26, 6393, 2369, 9, 3965, 3439, 25, 4237, 5

['O', 'X', 'j', '6499', 'I', '359', '1913', 'M', '6771', 's', '1621', '8259', 'E', 'H', 'E', '3699', '3473', 'Q', 'c', 'A', '6265', 'n', 'L', '7003', 'H', '4743', '8579']

15, 24, 10, 6499, 9, 359, 1913, 13, 6771, 19, 1621, 8259, 5, 8, 5, 3699, 3473, 17, 3, 1, 6265, 14, 12, 7003, 8, 4743, 8579