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: ['351', 'V', 'D', '611', 'd', '9885', '2813', '5511', '4341', '8747', '7783', 't', 'N', 'b', '6801', '1615', 'f', '9237', 'o', '9633', 'N', '2363', '1203', 'k']

351, 22, 4, 611, 4, 9885, 2813, 5511, 4341, 8747, 7783, 20, 14, 2, 6801, 1615, 6, 9237, 15, 9633, 14, 2363, 1203, 11