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: 2, 8, ['9691', 'u', 'o', '4027', 'q', '7799', 'v', '6433', '6817', 'u', 'w', 'Z']

SOLUTION: 3346v9977q7204ou

PROBLEM: 4, 9, ['2731', '4987', '2927', '8573', 'O', '8349', '9507', 'K', '7307', 'V']

SOLUTION: 7037K70599438O3758

PROBLEM: 7, 9, ['R', 'K', '2861', '9603', 'W', '7363', '2259', '3563', 'h', '2659', 'r', '4073', 'i', 'g', '8999', '2247', 'w', 'P', '9215', '6717', '7601', 'p', '7005', '867']

SOLUTION:
h36539522