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: ['I', 'b', 'S', '1623', 'z', 'm', '7535', 'i', '6841', 'V', 'j', '3817', '9445', '3491', '2719', '7423', 's', '9079', '8391', '1047', 'Q', '1905', '2787', '6901']

9, 2, 19, 1623, 26, 13, 7535, 9, 6841, 22, 10, 3817, 9445, 3491, 2719, 7423, 19, 9079, 8391, 1047, 17, 1905, 2787, 6901