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: 5, 11, ['4381', '7607', '3995', '7639', 'W', '2377', '2639', 'Z', 'D', '4511', 'K', '3211', '6939', 'n', 'J', 'd', '9647']

SOLUTION: K1154DZ93627732W

PROBLEM: 6, 9, ['V', 'Y', 'm', '235', 'K', '3381', 'h', 'T', '1455', 'F', '1385']

SOLUTION: 5541Th1833

PROBLEM: 7, 10, ['2121', '9665', 'G', '4305', 'q', 'M', '7433', '3877', 's', '5611']

SOLUTION:
1165s77833347