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: ['49', 'Q', 'r', '9829', 'j', '6103', 'E', 'Z', '4577', 'M', '7359']

49, 17, 18, 9829, 10, 6103, 5, 26, 4577, 13, 7359