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: ['2379', 'V', '6455', 's', 'c', '995', 'q', 'u', '5213', 'b', 'z', 'l', 'k', 'W', 'H', 'k', '1441', 'G', 'Z', '6357', 'H', '8105', '9817', 'k', 'x', '6847', 'H', 'C', 'k', '8539', '2709', '665', 'T', '2865', 'a', 's', 'G']

2379, 22, 6455, 19, 3, 995, 17, 21, 5213, 2, 26, 12, 11, 23, 8, 11, 1441, 7, 26, 6357, 8, 8105, 9817, 11, 24, 6847, 8, 3, 11, 8539, 2709, 665, 20, 2865, 1, 19, 7