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, 11, ['7391', '6663', '477', '4991', '1033', 'c', 'X', 's', '2517', 'i', 'M', '8437', 'J']

Output: Mi7152sXc330119947743666


Input: Consider Input: 3, 10, ['s', '3299', 'K', 'D', '4621', '9075', 'K', '6987', 'S', '9829', 'm', 'I', '3797']

Output: 9289S7896K57091264DK


Input: Consider Input: 20, 25, ['W', '6191', '8529', '9317', 'c', '2571', 'l', 'n', '985', 'u', 'W', 'b', 'd', '7339', 'B', '3279', 't', '449', 'm', '7359', '8155', '2809', '973', '291', '3627', '713', 'u', '7113']


Output: 7263192379908255189537