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:
7, 9, ['4311', 'Q', 'j', '3613', '9671', 'u', 'y', '3321', '2069', '4299', 'W', 'c', '627', '1327', '9747', 'Q', 'k', '9587', '5911']
answer:
96021233y


question:
5, 9, ['7453', '7415', 's', 'O', '1161', 'G', 'N', '5925', '3367', 'f', '7739', 'b', 'y', 'o', '2431', 'Y']
answer:
76335295NG1611


question:
3, 17, ['5367', '6943', '7677', '6845', 'G', '2825', '8431', 'a', 's', '6929', '1269', 'Y', 'Q', '1817', '171', 'E', '5899', 'x', '4729', 'v', 'P', '9609', '1749', '5239', '7889']
answer:

9985E1717181QY96219296sa13485282G54867767