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.

['f', '1287', '4749', 'Z', 'N', 'P', '5427', '3573', '4883', '6355', 'B', '2901', 'A', 'p', 'a', 'c', '1327', 'V', 'F', '873', '5635', '7393']
6, 1287, 4749, 26, 14, 16, 5427, 3573, 4883, 6355, 2, 2901, 1, 16, 1, 3, 1327, 22, 6, 873, 5635, 7393

['9407', 's', '3757', '6925', '8457', '7659', '2961', '1895', 'x', 'E', '1765', 'G', 'F', '369', 'R', '7845', 'i', 'Z', 'U', '4169', 'V', '6981', '1495', '8703', '9079', '5695', 'Z']
9407, 19, 3757, 6925, 8457, 7659, 2961, 1895, 24, 5, 1765, 7, 6, 369, 18, 7845, 9, 26, 21, 4169, 22, 6981, 1495, 8703, 9079, 5695, 26

['h', '5281', 'K', '6739', 'P', 'V', '8745', 'M', 'J', '9283', 'C', 'G', 'a', '5031', '5049', 'A', 'A', 'y']

8, 5281, 11, 6739, 16, 22, 8745, 13, 10, 9283, 3, 7, 1, 5031, 5049, 1, 1, 25