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:
2, 3, ['G', 'G', '7823', '8645', 'k', '1369', '7495', 'V', '2195', 'x', '3061', 'k', '7539', 'H', '8197', 'S', '7969', '9259', 'j']
answer:
3287G


question:
2, 5, ['l', 'E', '729', 'U', 'z', '9729', '3247']
answer:
zU927E


question:
5, 16, ['B', 't', '9683', '1521', 'e', 'z', 'V', '6695', 'u', 'c', '7237', 'z', 'z', '529', '7987', 'X', '5693', '4527', 'S', 'K', 'L', '5665', '7065', 'm', 'E', '8623', 's', '7449']
answer:

X7897925zz7327cu5966Vze