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: ['293', '1827', 'q', 'n', 'f', '5815', 'C', '7315', 'f', '5255', 'n', 'c', 'D', '6599', '7945', '6171', '9841', '7345', '823', '6061', 'N', '5497', 'X', '751', '7735', 'U']

293, 1827, 17, 14, 6, 5815, 3, 7315, 6, 5255, 14, 3, 4, 6599, 7945, 6171, 9841, 7345, 823, 6061, 14, 5497, 24, 751, 7735, 21