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.

[EX Q]: 2, 7, ['9969', 'u', '9811', 't', 'z', '8347', 'i', 'O', '5897']
[EX A]: i7438zt1189u

[EX Q]: 4, 7, ['C', 'j', 'F', '495', 'H', '6595', 'h', '7567', 'f']
[EX A]: h5956H594

[EX Q]: 16, 26, ['6069', '5705', 'l', '7059', '8511', 'n', 'N', 'e', 'd', 'a', 'l', '5281', '5305', 'r', 'A', '4897', '1453', 's', 'L', '9407', '3071', 'm', '9071', 'Y', 'b', 'G', 'i']
[EX A]:
GbY1709m17037049Ls35417984