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, 14, ['j', '2199', '6995', 't', 'U', 'C', '1589', '7061', '851', 'N', '7923', '7387', '2053', 'L', 'y', '3685', 'X', 'C', '4679', '3691', '2991', 'f']
answer:
L350278373297N15816079851


question:
9, 13, ['4635', '9581', '9269', 'A', '4887', 'V', '1767', '9267', 'T', '1895', '4941', 'q', '5979', '501']
answer:
9795q14945981T


question:
9, 15, ['p', '8779', 'y', 'd', 'm', '7863', '2285', 'I', '5729', '2573', 'Y', '1977', '7835', 'T', '2319', '8015', '6523', 'p', 'I', 'g', '6807', 'U', 'e', '7893', '3831', '8547', 'N']
answer:

9132T53877791Y37529275