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, 4, ['3633', 'k', '9685', 't']

SOLUTION: t5869k3363

PROBLEM: 2, 9, ['g', '309', 'x', '3537', '5995', 'K', '6951', 'x', 'b', '3171', '9079', '7597']

SOLUTION: bx1596K59957353x903

PROBLEM: 6, 12, ['R', 'o', 'U', 'x', 'g', 'w', '2703', 'V', 'y', 'A', '4409', 'b', 'F', '7589', 'M', '4211', 'Z', '2481', '8339', 'o']

SOLUTION:
b9044AyV3072w