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: ['m', '6545', 'f', 'd', '4633', 'V', '4895', 'j', 'h', '5451', 'M', '3041', 'n', 'j', 'p', '3569', '3347', 'O', '1841', 'b', '3959', '1449', 'e', 'q', 't', 'U', 'M', 'I', '4421']

13, 6545, 6, 4, 4633, 22, 4895, 10, 8, 5451, 13, 3041, 14, 10, 16, 3569, 3347, 15, 1841, 2, 3959, 1449, 5, 17, 20, 21, 13, 9, 4421