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:
10, 12, ['p', '6907', 'D', 'B', 'z', 'S', '3197', 'b', 'K', 'B', '2925', 'i', 'U', 'y', '5577', '1065', 'e', '7763', 's', '9493']
answer:
i5292B


question:
15, 23, ['Z', 'h', '4813', '7715', '8439', 'K', '9249', 'F', '9871', '6511', '1841', '4613', '5657', '8623', '4613', '8861', 'v', '3809', 'F', '7859', '9527', '4655', 'l', '8455', '4727', 'V', 'I', 'H', '3505', '6039']
answer:
l556472599587F9083v16883164


question:
1, 1, ['7671', 'S', 'm', '5639', 'T', 'u', 'U']
answer:

1767