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: ['3855', '2881', 'H', '2949', 'p', '8803', 'y', 'o', '4603', 'p', '5301', '953', 'V', '3435', 'y', 'G', '413', '2939', 'Y', '3307', '9581', 'u', 'M', 'y', '5197', 'T', 'M', '3211', '9677', 'm', 'Y']

3855, 2881, 8, 2949, 16, 8803, 25, 15, 4603, 16, 5301, 953, 22, 3435, 25, 7, 413, 2939, 25, 3307, 9581, 21, 13, 25, 5197, 20, 13, 3211, 9677, 13, 25