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: ['2841', '4223', 'R', '2231', 'L', 'n', 'w', 'M', '6365', 'm', '4333', 'j', '3955', '8953', '7615', '1431', 'H', '2993', '7623', 'd', '2545', '5929', 'I', '243', '6937', 'V', '8415', 'E', '9009', '2197', 'G', 'c', 'M', 'H', 'B', '7831']

2841, 4223, 18, 2231, 12, 14, 23, 13, 6365, 13, 4333, 10, 3955, 8953, 7615, 1431, 8, 2993, 7623, 4, 2545, 5929, 9, 243, 6937, 22, 8415, 5, 9009, 2197, 7, 3, 13, 8, 2, 7831