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, 1, ['341', '939']
answer:
143


question:
1, 12, ['2851', 'v', '8871', 'Z', '2227', 'm', 'z', 'B', 'v', '765', '1435', 'V', 'X', 'k', '5955', '2549']
answer:
V5341567vBzm7222Z1788v1582


question:
1, 3, ['F', 'R', 'v', 'X', '7135', 'V', '8597', '5153', 'T', '4513', 'B', '7089', 'Q', '3621', 'o', 'W', '4555', '9307', '9997', 'I', '1029', 'c', '363', 'G']
answer:

vRF