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: ['Z', 'j', '5749', 'o', '6633', 'i', '8255', '975', 'K']

26, 10, 5749, 15, 6633, 9, 8255, 975, 11