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.

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

4, 16, ['O', 'x', 'E', 'z', 'q', '2235', 'j', 'Q', '9655', '6887', '7651', '4695', 'p', 'M', '7975', 'p', 'u', '7275', 'y', 'w', '9677', 'I', '8609', '3333', '1835', '7137', '2509', '6157', '1805']
p5797Mp5964156778865569Qj5322qz

6, 19, ['6125', '9069', '5411', '9593', 'v', 'Y', '8153', '7129', '2503', '1853', '4347', '3835', '7689', 'A', 'y', 'X', 'Z', '5269', 'R', 'Y', 'w', '2379', '8997', '4287', '2247', '2667', 'g', 'u', '1893']

R9625ZXyA9867538374343581305292173518Y