instruction:
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.
question:
3, 5, ['j', '239', '9689', 's', 'C', 'w']
answer:
Cs9869


question:
1, 1, ['9675', 'e', '4343', '8021']
answer:
5769


question:
13, 28, ['Q', 'M', '151', '9883', 'Y', 'y', 'H', 'R', '8089', 'E', 'z', 'X', 'H', 'i', '7885', 'z', '4635', 'M', 'y', '9531', 'O', 'U', '2013', '1803', '9733', 'F', '5443', '2453', 'y', '8235']
answer:

35423445F337930813102UO1359yM5364z5887iH