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: ['1805', '1303', 'R', '751', '483', 'o', '8697', 'P', '1057', 'z', 'm', '7593', 'r', '5251', 'B', 'n', 'Z', 'C', 'A', '9761', 'r', '943', 'p', '6465']

1805, 1303, 18, 751, 483, 15, 8697, 16, 1057, 26, 13, 7593, 18, 5251, 2, 14, 26, 3, 1, 9761, 18, 943, 16, 6465