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, 2, ['5111', 'U', '441', '8381']

SOLUTION: U1115

PROBLEM: 5, 7, ['Y', '5101', 'B', '5129', 'a', 'y', 'v', '4577', '5455', '6685', '6435']

SOLUTION: vya

PROBLEM: 2, 14, ['9377', '5859', 'o', 'N', 'H', '9811', '615', 's', '9031', '2379', 'Q', '9953', 't', 'm', '1631', '3127']

SOLUTION:
mt3599Q97321309s5161189HNo9585