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: ['1645', 'T', '4387', '1397', '2129', '2209', '5351', '375', 'g', '2889', '7341', '3063', '7087', '7147', 'v', 'E', '4945', 'l', 's', '5153', '7769', '8315', '2187', '1393', 'H', '4117', '9879', '3289', 'h', 'Z', '3861', '6409', 'm', '4213', '6073', '61', '197', '433', '451']

1645, 20, 4387, 1397, 2129, 2209, 5351, 375, 7, 2889, 7341, 3063, 7087, 7147, 22, 5, 4945, 12, 19, 5153, 7769, 8315, 2187, 1393, 8, 4117, 9879, 3289, 8, 26, 3861, 6409, 13, 4213, 6073, 61, 197, 433, 451