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: ['7159', 'j', '4559', '6303', 'C', 'x', 'p', '1473', 'q', '4529', '2105', '9703', '2563', 'j']

7159, 10, 4559, 6303, 3, 24, 16, 1473, 17, 4529, 2105, 9703, 2563, 10