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.

['N', '8821', 'U', 'X', 'N', '4125', 's', 'C', '9141']
14, 8821, 21, 24, 14, 4125, 19, 3, 9141

['4113', 'T', 'd', 'd', 'X', 'w', 'S', 'E', '4573', 'v', 'F', '7881', '1381', '3701', 't', 'N', '807', '3497', 'C', '3341', '529', 'M', '8529', 'B', 'l', 'M', 'T', '2033', '3011']
4113, 20, 4, 4, 24, 23, 19, 5, 4573, 22, 6, 7881, 1381, 3701, 20, 14, 807, 3497, 3, 3341, 529, 13, 8529, 2, 12, 13, 20, 2033, 3011

['5071', 'I', 'r', 'm', '9873', '755', '2811', 'X', 'd', 'M', 'V', '4103', '6055', '7073', '3523', 'E', 'e', 'P', '1375', '4637', 'X', '2071', 'e']

5071, 9, 18, 13, 9873, 755, 2811, 24, 4, 13, 22, 4103, 6055, 7073, 3523, 5, 5, 16, 1375, 4637, 24, 2071, 5