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: ['5561', '7173', 'I', 'A', '5611', '6661', 'p', '6321', 'g', 'g', '6089', 'D', '9145', '5925', '4873', '8817', '6467', '4099', 'i', 'o']

5561, 7173, 9, 1, 5611, 6661, 16, 6321, 7, 7, 6089, 4, 9145, 5925, 4873, 8817, 6467, 4099, 9, 15