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:
6, 7, ['E', 'A', 'd', 'a', 'S', '851', '8465', '3205', '5169', '7097', '1679', '3875', 'B', '4761']
answer:
5648158


question:
4, 9, ['g', '6285', 'B', 'l', '5153', 'n', '9751', 'X', 'w', '2291', 'S']
answer:
wX1579n3515l


question:
1, 28, ['1169', '9919', '5873', '9263', 'z', 'L', '1937', '6257', '9787', 'e', '835', '7675', 'w', '3633', 'C', 'x', '7139', '9517', '679', 'k', 'g', 'P', '953', 'b', 'X', 'F', '5945', '4309']
answer:

90345495FXb359Pgk97671599317xC3363w5767538e787975267391Lz3629378591999611