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, 10, ['s', '3299', 'K', 'D', '4621', '9075', 'K', '6987', 'S', '9829', 'm', 'I', '3797']

SOLUTION: 9289S7896K57091264DK

PROBLEM: 3, 6, ['6843', '7805', 'h', '9097', 'O', 'u']

SOLUTION: uO7909h

PROBLEM: 6, 14, ['Z', '5097', '219', 'D', '9379', 'Z', 'a', '8177', 'w', 'E', 'p', '3763', 'b', '3529', '2955', '4377', '2917', 'e']

SOLUTION:
9253b3673pEw7718aZ