TASK DEFINITION: In this task, you are given inputs 'i', 'j', and A, where 'i' and 'j' are integers and A is a list. A list is shown by two brackets and comma-separated numbers and characters inside, like ['1', '12', 'l']. You need to concatenate all elements of A from the ith element to the jth element, and then reverse the resulting string. 'i' and 'j' will be non-negative, and will always have a value less than the length of A. 'i' will always be less than 'j'. Perform the operations in order, i.e., do not reverse first and then concatenate.
PROBLEM: 3, 6, ['A', '6949', '2045', '119', '1373', '9613']

SOLUTION: 316937319115402

PROBLEM: 2, 11, ['7391', '6663', '477', '4991', '1033', 'c', 'X', 's', '2517', 'i', 'M', '8437', 'J']

SOLUTION: Mi7152sXc330119947743666

PROBLEM: 1, 18, ['321', 'S', '8605', '7519', 'p', '4027', 'v', 'g', 'C', 'b', 'H', 'G', 'r', '2183', '271', 'T', '2473', '5043']

SOLUTION:
34053742T1723812rGHbCgv7204p91575068S123