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, 16, ['2479', 'F', '5727', '3779', '5749', '4677', 'o', 'P', 'e', '2433', 'z', '3789', 't', 'L', 'I', 'V', 'Z', 'o', 'u', '1209', 'q']

SOLUTION: VILt9873z3342ePo7764947597737275

PROBLEM: 4, 5, ['S', 'S', 'L', '7199', '3259', '8515', '8657', '8201', 'V']

SOLUTION: 95239917

PROBLEM: 2, 11, ['u', 'F', 'd', '1985', '895', '5897', '1751', '6431', 'c', '7911', 'v']

SOLUTION:
v1197c1346157179855985891dF