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: ['u', 'S', '3955', 'q', 'I', 'i', '8997', 'f', '1865', 'c', 'i', 'N', 'd', 'W', 'M', '6805', '1395', 'D', 't', 'e', '8085', '3191', 'V']

21, 19, 3955, 17, 9, 9, 8997, 6, 1865, 3, 9, 14, 4, 23, 13, 6805, 1395, 4, 20, 5, 8085, 3191, 22