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:
1, 8, ['9669', '9577', '2831', 'Y', 'y', 'q', 'f', 'b', 'L', 'v', '5545', '7305']
answer:
bfqyY138277599669


question:
2, 2, ['9085', '5983', '3197', 'C']
answer:
3895


question:
2, 4, ['8983', 'T', 'g', '5341', 'i', 'w', 'x', 'e', '7353', '3467', 'X', 'g', '4047', 'i']
answer:

1435gT