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.

['P', '2877', 'r', 'e', 'n', 'A', '4115', '6491', 'N', '5689', 'x', '87', 'A', '7575', '7175', 'D', 'e', 'L', 'p', '6671', '4921', 'A', '7255', '4653', 'u']
16, 2877, 18, 5, 14, 1, 4115, 6491, 14, 5689, 24, 87, 1, 7575, 7175, 4, 5, 12, 16, 6671, 4921, 1, 7255, 4653, 21

['2609', '8593', 'X', '365', '8173', '1859', '4371', 'M', '7949', 'O', 'D']
2609, 8593, 24, 365, 8173, 1859, 4371, 13, 7949, 15, 4

['2139', 'z', 'N', 'Z', '6757', '7629', '7753', '8725', 'K', 'l', 'J', '9747', 'E', 'y', 'F', '6617', 'n', 'X', 'M', '7607', '8683', 'Z', '2559', 'v', '95', '9245', 'F', 'g', '3717', '855', 'k', '83', 'w', 'd', 'N', 't']

2139, 26, 14, 26, 6757, 7629, 7753, 8725, 11, 12, 10, 9747, 5, 25, 6, 6617, 14, 24, 13, 7607, 8683, 26, 2559, 22, 95, 9245, 6, 7, 3717, 855, 11, 83, 23, 4, 14, 20