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: 6, 9, ['6157', 'Z', 'f', 'N', 'Z', 'T', '7299', 'G', 'w', '3923', 'H', '3255']

SOLUTION: wG9927T

PROBLEM: 6, 7, ['J', '701', 'm', '8837', 'b', 'd', '5911', 'y', '8031']

SOLUTION: 1195d

PROBLEM: 1, 7, ['H', 'f', '7161', 'u', 'f', '1387', '9271', '5115', '5859', '5679', '9885', '4567', '87', 'o', '3993', '3515', '3049', '8911', '129', 'J', 'v', 'u', 'k', 'Q', 'x', 'Q', '5997']

SOLUTION:
17297831fu1617fH