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.

Input: Consider Input: 2, 4, ['4047', 'S', '4249', '1735', '207']

Output: 53719424S


Input: Consider Input: 4, 20, ['H', '7451', 'X', 'i', '951', '1913', '9949', 'W', '4759', '1309', '1981', 'C', 'J', 'F', '4125', 'l', 'i', 'z', 'S', 'R', '5025', '5959', '1323', 'K', 'O', 'x', '5121', 'c', 'C']

Output: RSzil5214FJC189190319574W94993191159i


Input: Consider Input: 1, 14, ['m', '1727', '7357', 'o', 'W', 'p', 'B', '1061', '5537', 'D', 's', '4271', '397', 'u', 'B', 'z', 'l', 'D', '87', 'd', 'R', 's', '5137', 'W']


Output: u7931724sD73551601BpWo75377271m