Definition: 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.
Input: ['861', '4399', 'u', '9505', 'F', '7313', '8441', '5825', 'n', '8359', '225', '3677', '8653', 'J', '9649', 'p', '9387', 'B', 'y', 'z', '5189', '841', '4297', 'v', '6235', 'b', 'x', 'K', 'u', '4729', '6135', '6089', 'z', '6811', '1171', '5479', 'B', 'g', 'V']

861, 4399, 21, 9505, 6, 7313, 8441, 5825, 14, 8359, 225, 3677, 8653, 10, 9649, 16, 9387, 2, 25, 26, 5189, 841, 4297, 22, 6235, 2, 24, 11, 21, 4729, 6135, 6089, 26, 6811, 1171, 5479, 2, 7, 22