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: ['3665', '4841', '217', '905', '7173', '3945', 'R', 'I', '1917', '441', '8941', 'U', '8001', 'Z', '5665', '5537', 'W', '8873', '4621', 'r', 'D', '9969', 'g', 'x', '6561', '7441', 'i', '97', '1231', '5571', '6749', '735', '2059', '5617', '2871', 'Y', 'r', '269']

3665, 4841, 217, 905, 7173, 3945, 18, 9, 1917, 441, 8941, 21, 8001, 26, 5665, 5537, 23, 8873, 4621, 18, 4, 9969, 7, 24, 6561, 7441, 9, 97, 1231, 5571, 6749, 735, 2059, 5617, 2871, 25, 18, 269