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: ['7995', 'P', 'u', '7787', '4953', '9811', '161', 'k', '7387', 'g', '2509', 'L', '1825', '2121', '3291', 'q', '2881', '3231', '4877', '7467', '6815', '7967', 'd', '3081', 'Z', '615', '4627', '8949', '8321', 'O', 'e', 'W', '1181', 'T']

7995, 16, 21, 7787, 4953, 9811, 161, 11, 7387, 7, 2509, 12, 1825, 2121, 3291, 17, 2881, 3231, 4877, 7467, 6815, 7967, 4, 3081, 26, 615, 4627, 8949, 8321, 15, 5, 23, 1181, 20