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: ['s', 'I', '8305', 'A', 'e', '8739', 't', 'H', '4301', '3817', 'A', '9801', '4319', '3783', '8473', '375', 'R', '2261', '8059', '8571', '8157', 'j', 'D', 'U', '2289', '6685', 'I', 'J']

19, 9, 8305, 1, 5, 8739, 20, 8, 4301, 3817, 1, 9801, 4319, 3783, 8473, 375, 18, 2261, 8059, 8571, 8157, 10, 4, 21, 2289, 6685, 9, 10