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, 14, ['E', 't', '3441', '459', '6559', 'q', 'b', '2583', 'Z', 'X', 'F', 'j', '601', '2137', 'S', '9739', 'c', 'I', 'l', '4443']

SOLUTION: 7312106jFXZ3852bq9556

PROBLEM: 1, 4, ['6969', 'P', '8161', '6347', 'P', 'S', 'z']

SOLUTION: 74361618P9696

PROBLEM: 2, 5, ['P', '4985', '5199', 'a', 'W', 'e', 'l', 'u', '3911', '1895', 'r', 't', 'C', '9593', 'E', '3853', '6737', '6009', '2191']

SOLUTION:
Wa99155894