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: ['5319', 'G', '6901', '3897', 'D', '7909', 'x', '2723', '9683', 'k', '91', 'P', 'u', '5847', 'X', '2795', 'w', '9953', 'D', 'y', '1401', 'F', '8885', 'V', '7301', 'V', '9073', '7831', '1151', 'z', '1425', '2121', '1395', 't', 'W']

SOLUTION: 5319, 7, 6901, 3897, 4, 7909, 24, 2723, 9683, 11, 91, 16, 21, 5847, 24, 2795, 23, 9953, 4, 25, 1401, 6, 8885, 22, 7301, 22, 9073, 7831, 1151, 26, 1425, 2121, 1395, 20, 23

PROBLEM: ['1949', '8001', 'N', 'v', 'o', '2579', 'a', 'P', 'G', 'J', 'u', 'h', '5117', '5709', 'q', 'Y', '4671', '7933', 'U', 'z', 'u', 'm', '7171', '7561', 'z', '9533', 'j', '7683']

SOLUTION: 1949, 8001, 14, 22, 15, 2579, 1, 16, 7, 10, 21, 8, 5117, 5709, 17, 25, 4671, 7933, 21, 26, 21, 13, 7171, 7561, 26, 9533, 10, 7683

PROBLEM: ['u', 'P', 't', 'E', 'w', '8587', '361', '3863', '8295', '1969', 'D', '7043', 'l']

SOLUTION:
21, 16, 20, 5, 23, 8587, 361, 3863, 8295, 1969, 4, 7043, 12