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: 1, 2, ['4211', '3035', '3071', '3941', 'D', '1851']

SOLUTION: 53031124

PROBLEM: 1, 8, ['9669', '9577', '2831', 'Y', 'y', 'q', 'f', 'b', 'L', 'v', '5545', '7305']

SOLUTION: bfqyY138277599669

PROBLEM: 5, 12, ['e', 'u', '1919', 'H', '9087', '8751', 'E', '665', 'i', 'E', 'q', 'z']

SOLUTION:
zqEi566E15787809