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: ['t', 'U', '4407', '8601', 'd', 'D', '1209', '7387', 'A', '6899', 'k', '653', '1929', '4271', 'a', '997', 'Z', 'S', 'A', 'Z', 'o', 'E', 'p', 'Q', 'r', 'J']

SOLUTION: 20, 21, 4407, 8601, 4, 4, 1209, 7387, 1, 6899, 11, 653, 1929, 4271, 1, 997, 26, 19, 1, 26, 15, 5, 16, 17, 18, 10

PROBLEM: ['1183', '4279', 'f', 'I', 'I', '3533', '891', 'z', '5947', '8717', '6875', '7121', '3503', 'l', '1909', 'E', '6613', '5571', 's', 'R', 'e']

SOLUTION: 1183, 4279, 6, 9, 9, 3533, 891, 26, 5947, 8717, 6875, 7121, 3503, 12, 1909, 5, 6613, 5571, 19, 18, 5

PROBLEM: ['7395', '1273', 'd', '4557', '5865', 'X', 'n', '3477', '233', 'v', 'b', 'S', 'j', '727', 'S', 'R', 't', 'c', '2293', '3233', 'L', '8737', '2539', '6555', 'q', '6653', 'i', 'O', '7743', '339', '265', '8157', 'i', '8245', 'L']

SOLUTION:
7395, 1273, 4, 4557, 5865, 24, 14, 3477, 233, 22, 2, 19, 10, 727, 19, 18, 20, 3, 2293, 3233, 12, 8737, 2539, 6555, 17, 6653, 9, 15, 7743, 339, 265, 8157, 9, 8245, 12