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: 1, 14, ['d', 'Y', 'G', '5849', '6425', 't', '7727', '7863', '131', '6013', '9683', 'Z', 'n', 'y', 'U', 'g', '8675', '1377', 'L', 'u', '6811']

SOLUTION: ynZ3869310613136877277t52469485GYd

PROBLEM: 5, 12, ['9227', 'P', 'T', 'k', 'p', '9785', '2047', 'M', '827', '2815', 'C', '7071', 'Y', 'y', '3657', '9961', 'o']

SOLUTION: 1707C5182728M74025879p

PROBLEM: 12, 15, ['P', '7213', 'H', 's', 'F', '1223', '9715', '4763', 'K', 's', 'H', '2825', '2727', 'Q', 'W', '7865', '6113', '1059', 't', '3679', 'J', 'D', '3435', 'C', '3153', 'm', 'X', '839', '1009', 'g']

SOLUTION:
WQ72725282