TASK 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.
PROBLEM: ['D', '7557', '2965', 'N', 'd', 'R', '2845', 'f', '8165', 'Y', 'N', '4109', 't', '7323']

SOLUTION: 4, 7557, 2965, 14, 4, 18, 2845, 6, 8165, 25, 14, 4109, 20, 7323

PROBLEM: ['7565', 'c', '4849', '6873', '6901', 'Q', '4237']

SOLUTION: 7565, 3, 4849, 6873, 6901, 17, 4237

PROBLEM: ['9887', '3671', 'l', 'x', 'D', 'j', 'V', 't', 'o', 'y', 'K', 'f', 'K', '1053', '4163', '8913', '5775', 'D', 'G', '291', 'l', '725', 'A', '3817']

SOLUTION:
9887, 3671, 12, 24, 4, 10, 22, 20, 15, 25, 11, 6, 11, 1053, 4163, 8913, 5775, 4, 7, 291, 12, 725, 1, 3817