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: ['4917', '5041', 'Q', 'T', 'C', '6841', '1353', '3063', '5347', 'R', 'd', 'r', 'u', 's', 'm', '9077', 'd', 'w', 'E', '4951', 'w', 'U', '9773', '6755', '387', '4087', '7267', 'P', 'U', '241', '1157']

4917, 5041, 17, 20, 3, 6841, 1353, 3063, 5347, 18, 4, 18, 21, 19, 13, 9077, 4, 23, 5, 4951, 23, 21, 9773, 6755, 387, 4087, 7267, 16, 21, 241, 1157