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: ['r', '6177', '8437', 'F', '6175', '221', 'z', 'L', '6395', '355', 'm', '6183', 'H', 'k', '8495', 'W', '9583', 'q', 'F', '1603', '3611', '4743', '8187', 'Y', 'P', '9499', 'F', 'a', 'Z', '707', 'd', '6047']

18, 6177, 8437, 6, 6175, 221, 26, 12, 6395, 355, 13, 6183, 8, 11, 8495, 23, 9583, 17, 6, 1603, 3611, 4743, 8187, 25, 16, 9499, 6, 1, 26, 707, 4, 6047