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.

['1991', 'H', '7993', '9071', '6949', 'g', 'h', 'C', '305', 'x', '5557', '1181', 'H', '663']
1991, 8, 7993, 9071, 6949, 7, 8, 3, 305, 24, 5557, 1181, 8, 663

['K', 'E', '6735', '6095', '9533', 'P', '6853', '5261', 'i', '6541', '8221', 'G', 'x', '7249', '2677', 'O', '689', 'X', '9767', 'z', 'g', '7675', '4797', 'h', 'Q', '8007', 'O', '6817', 'v', 'a', 'H', '5473', '9749', 't', 'I', 'G', 'k', '8063', 'T']
11, 5, 6735, 6095, 9533, 16, 6853, 5261, 9, 6541, 8221, 7, 24, 7249, 2677, 15, 689, 24, 9767, 26, 7, 7675, 4797, 8, 17, 8007, 15, 6817, 22, 1, 8, 5473, 9749, 20, 9, 7, 11, 8063, 20

['1935', 'B', 't', 'C', 'n', 'J', '9243', '2163', 'i', 's', '8709', '6379', '3369', 'm', '797', '9309', '7873', 'y', '5847', '1913', '3349']

1935, 2, 20, 3, 14, 10, 9243, 2163, 9, 19, 8709, 6379, 3369, 13, 797, 9309, 7873, 25, 5847, 1913, 3349