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: ['1967', 'j', 'I', '1993', 'I', 'J', '5897', 'q', '4671', '5845', '669', '2669', '5865', '1395', 'h']

1967, 10, 9, 1993, 9, 10, 5897, 17, 4671, 5845, 669, 2669, 5865, 1395, 8