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: ['y', 'Z', 'R', '1697', 'd', '9765', '5483', '3729', 'l', '727', 'j', 'u', 'E', 'n', '103', '4897', '9583', 'x', '5367', 'l', '7671', '4251', 'J', '8827', 'q', 'r', '8671', '1331', 'i', '7915', '1985', '525', 'B', 'x']

25, 26, 18, 1697, 4, 9765, 5483, 3729, 12, 727, 10, 21, 5, 14, 103, 4897, 9583, 24, 5367, 12, 7671, 4251, 10, 8827, 17, 18, 8671, 1331, 9, 7915, 1985, 525, 2, 24