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: 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: 4, 16, ['9593', '3873', 'f', 'l', 'Z', '6157', 'n', 'l', '827', '9127', '143', 'J', '2223', 'A', 'o', '4733', 'C', 'U', 'V', '2613', 'r', 't', 'Q', 'l', 'H', '5189', 'J', 'I']

Output: 3374oA3222J3417219728ln7516Zl


Input: Consider Input: 19, 25, ['215', 'E', 'g', 'Q', '8267', '8123', 'c', 'o', 'H', '917', '6343', 'F', '8833', 'V', '9337', 'K', '8075', '5123', '9885', '5509', 'c', 'y', 'y', '7361', '5941']


Output: 14951637yyc90555889