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.

Ex Input:
2, 5, ['6345', '7381', 'm', '5685', '3267', '9841', '9719', 'N', 'e', '1455', 'i', '3989', '3285', '9257', 'u', '8547', '1799']

Ex Output:
76235865m1837


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

Ex Output:
53719424S


Ex Input:
4, 5, ['m', 'A', '7913', 'W', 'e', 'g', '433', 't', 'Q', '8709']

Ex Output:

eW