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: ['k', '5585', '5891', '8701', '9205', 's', 'z', '3347', '6819', 'n', 'o', '4991', 'm', 'p', '8039', 'F', '2669', '9007', 'I', 'U', 's']

11, 5585, 5891, 8701, 9205, 19, 26, 3347, 6819, 14, 15, 4991, 13, 16, 8039, 6, 2669, 9007, 9, 21, 19