Detailed Instructions: 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.
Q: ['3957', 'D', 'S', 'r', '361', 'x', 'R', 'I', '8927', 'l', '8845', 'g', 'i', '6801', 'V', '3335', '615', '2939']
A:
3957, 4, 19, 18, 361, 24, 18, 9, 8927, 12, 8845, 7, 9, 6801, 22, 3335, 615, 2939