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, 3, ['2047', 'R', '6885', '1243', 'Z']
answer:
5886


question:
2, 7, ['P', 'Q', 'i', '1593', 'M', '8577', 'd', 'Y']
answer:
d7758M3951iQ


question:
3, 10, ['x', '8855', 'b', '3485', 'x', 'l', 'y', 'c', '5253', '3867', '5093', '3885', 'x', '397', '267']
answer:

76833525cylx5843b