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.

['2751', '4053', 'u', 'e', 'g', '5901', 'l', 'r', 'N', '8445', '7433', '1067', '2989', '1783', 'Q', 'R', '4305', '1231', '3239', 'j', 'G', 'G', '1291', 'A', '6139', 'Z', '1501', 'J']
2751, 4053, 21, 5, 7, 5901, 12, 18, 14, 8445, 7433, 1067, 2989, 1783, 17, 18, 4305, 1231, 3239, 10, 7, 7, 1291, 1, 6139, 26, 1501, 10

['1107', 'C', '5921', '7815', '1509', 'l']
1107, 3, 5921, 7815, 1509, 12

['3315', 'i', '551', '3875', 'O', '6651', '371', 'T', 'b', '2263', 'I', 'V', 'y', 'Q', 'p', '7971', 'y', '639', 'U', '1387', '6137', 'l', 'O', '5273', '7573', 'K', 'A', 'P', 'C']

3315, 9, 551, 3875, 15, 6651, 371, 20, 2, 2263, 9, 22, 25, 17, 16, 7971, 25, 639, 21, 1387, 6137, 12, 15, 5273, 7573, 11, 1, 16, 3