TASK DEFINITION: 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.
PROBLEM: 8, 13, ['O', '5581', 'r', 'H', 'f', 'y', 'A', 'g', '6023', 'G', 'G', 'm', '8767']

SOLUTION: 7678mGG3206g

PROBLEM: 2, 7, ['P', 'Q', 'i', '1593', 'M', '8577', 'd', 'Y']

SOLUTION: d7758M3951iQ

PROBLEM: 7, 17, ['7559', '5389', '6269', '4031', '6915', '9399', '2701', '2063', '3389', 'D', '7653', 'W', '1413', '6429', 'n', '6263', 'S', 'a', 'L', 'X', 'h', 'f', '9221', '5255', 'K']

SOLUTION:
S3626n92463141W3567D983336021072