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', '399', 'l', 'V', '6595', 'P', '1873', 'H', 'T', '5063', 'y', '5921', '5769', 'G', 'o', '3839', 'o', 'm', '3877', 'V', 'x', 'V', '5673', '7877', '9021', 'K']
6, 399, 12, 22, 6595, 16, 1873, 8, 20, 5063, 25, 5921, 5769, 7, 15, 3839, 15, 13, 3877, 22, 24, 22, 5673, 7877, 9021, 11

['u', 'n', '2763', 'n', '5869', 'w', '4847', '4369', '8245', '9801', 'W', '7991', 't', '9233', 'Z', '3521', 'Z', 'H', 'N', 'a', '9811', '5705', '6637', '5067', 'o']
21, 14, 2763, 14, 5869, 23, 4847, 4369, 8245, 9801, 23, 7991, 20, 9233, 26, 3521, 26, 8, 14, 1, 9811, 5705, 6637, 5067, 15

['u', 'i', 'l', 'p', '7463', 'R', '2161', 'N', 'u', '6427', 'V', '8073', '7299', '4171', '9911', '9277', 'Z', '5165', 'H', '7665', 'F', '2113', '3559', 'c', '8931']

21, 9, 12, 16, 7463, 18, 2161, 14, 21, 6427, 22, 8073, 7299, 4171, 9911, 9277, 26, 5165, 8, 7665, 6, 2113, 3559, 3, 8931