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:
1, 8, ['X', 'I', '9323', 'A', 'v', 'd', '7685', 'Z', 'p']

Ex Output:
Z5867dvA3239IX


Ex Input:
3, 3, ['8097', '3167', '809']

Ex Output:
908


Ex Input:
15, 21, ['7943', 'u', '5871', 'U', '3181', 'D', 'a', '2037', '9435', 'm', 'z', 'l', 'h', 'o', 'u', '4187', 'm', 'I', 'E', 'y', '2257', 'H', '9901', 'y', 'r', 'g', 'P', 'P', 'a', '9747']

Ex Output:

7522yEIm7814u