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: 7, 9, ['5683', 'M', '3363', 'H', '161', '6767', 'w', 'j', 't']

Output: tjw


Input: Consider Input: 16, 16, ['7539', 'A', '8589', 'T', 'Q', 'u', 'z', 'A', '9751', '2913', '7453', '5649', 'Q', 'H', 'Z', 'O', 'v', 'V']

Output: O


Input: Consider Input: 6, 21, ['X', 'X', 'p', '4701', '655', 'o', '4457', 'd', '6861', '9839', '4973', 'M', '9239', '5911', 'W', '2197', 'z', '8635', 'C', '4969', 'J', 'B', '4487', '3021', 'v', 'P']


Output: J9694C5368z7912W11959329M379493891686d7544o