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.

['l', '7159', '2047', '8289', '6907', 'F', 'Q', '799', 'o', '7825', 'R', '2813', '4735', 'y', '6159', 'f', 'G', '703', 'y', 'H', '8011', 'G', 'r', 'a', '483', 'G', '27', '9861', '3979']
12, 7159, 2047, 8289, 6907, 6, 17, 799, 15, 7825, 18, 2813, 4735, 25, 6159, 6, 7, 703, 25, 8, 8011, 7, 18, 1, 483, 7, 27, 9861, 3979