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, 3, ['4523', '3909', 'V', '7275', '5721', '6113', 'G', '5319', '3519']
answer:
V90933254


question:
4, 4, ['w', '3895', '4989', '7875', 'u']
answer:
5787


question:
5, 13, ['Q', '5947', 'o', '1991', 'A', 'X', 'T', '821', '8331', 'C', '2521', '4817', '751', '9835', '6803', '1441', '4201', 'p', 'O', 'G', '2515', '4831']
answer:

15771841252C1338128TXA