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, 10, ['9543', '2797', '3939', '8207', '329', 'l', '5353', '8849', '5579', '7445']

SOLUTION: 5447975594883535l92370289393

PROBLEM: 10, 10, ['Z', 'Z', '2205', '7113', 'G', 'k', '973', 'I', 'n', '415', '1505']

SOLUTION: 514

PROBLEM: 2, 12, ['9683', 'G', 'w', '1333', 'B', '2833', 'W', '9287', '9533', 'I', 'v', 'Z', 'y', '6475', '5739']

SOLUTION:
ZvI33597829W3382B3331wG