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: ['2335', 'D', '4047', 'l', '6251', '187', 'd', '3997', '1709', 'S', 'y', 'V', 'j', '2061', 'h', 'M', '1039', 'i', '7879', '5845', '4387', 'u', 'b', 'h', '5233', '373', '4607', 'm', '4403', 'K', 'l', 'm', '2659', '8175', 'K', 'g']

2335, 4, 4047, 12, 6251, 187, 4, 3997, 1709, 19, 25, 22, 10, 2061, 8, 13, 1039, 9, 7879, 5845, 4387, 21, 2, 8, 5233, 373, 4607, 13, 4403, 11, 12, 13, 2659, 8175, 11, 7