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: ['b', '923', '5997', '239', '7643', '9897', '6359']

SOLUTION: 2, 923, 5997, 239, 7643, 9897, 6359

PROBLEM: ['R', '5811', '8603', '8417', 'z', 'F', '3247', 'E', '1411', '6897', 'K', 'V', '7271', '1243', '5747', 'y', '5453']

SOLUTION: 18, 5811, 8603, 8417, 26, 6, 3247, 5, 1411, 6897, 11, 22, 7271, 1243, 5747, 25, 5453

PROBLEM: ['7295', 'B', '2711', 'r', '1851', 'r', 'l', '5341', '3319', '5437', 'q', '679', '4633', 's', 'S', 'a', 'V', 'M', 'f', '2979', '5119', 'S', 't', 'R', 'K', 'q', '5655', 't', '9567', '4749', 'Y', '7049', 'B', '3999', '7679']

SOLUTION:
7295, 2, 2711, 18, 1851, 18, 12, 5341, 3319, 5437, 17, 679, 4633, 19, 19, 1, 22, 13, 6, 2979, 5119, 19, 20, 18, 11, 17, 5655, 20, 9567, 4749, 25, 7049, 2, 3999, 7679