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, 12, ['2159', 'f', 'u', '2675', '7357', '9325', '1275', '8897', 'I', '2095', '5835', '577', 'g', '2783', '7843', '8517', '4185', '5847', '2645', '2357', 'l', 'v', '2239', '141', 'o', '2529', '7977', '8445', '2363']

SOLUTION: 77553855902I79885721523975375762u

PROBLEM: 3, 4, ['E', 'k', '4697', 'f', 'J', 's', '1265', '4673', 'D', '3345', 'n', '5593', '2249', '5951']

SOLUTION: f7964

PROBLEM: 6, 12, ['N', '9137', 'v', 'u', 'e', 'o', '6285', '7453', 'w', '2053', 'V', '8251', 't', 'v', '7815']

SOLUTION:
1528V3502w35475826o