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: ['4063', 'O', 'H', 'V', '1305', '2565', 'b', '8587', 'I', '3313', 'C', '2635', '7539', 'r', 'N', '1615', 'r', 'b', 'D', 'H', '5789', '7063', 'x', '8529', '3417', '3289', 'N', '9147', '9611', '2849', '9763', 't', 'w', 'Z', '2353']

4063, 15, 8, 22, 1305, 2565, 2, 8587, 9, 3313, 3, 2635, 7539, 18, 14, 1615, 18, 2, 4, 8, 5789, 7063, 24, 8529, 3417, 3289, 14, 9147, 9611, 2849, 9763, 20, 23, 26, 2353