In this task, you are given inputs i,j, and A, where i and j are integers and A is a list. You need to concatenate all elements of A from the ith element to the jth element, and print the resultant 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.
--------
Question: 2, 5, ['7791', '8561', 'r', 'e', '7821', '2611', '1', 'P', 'n', '4097', 'z', 'a', '9589', 'M', '8867']

Answer: 8561re7821


Question: 2, 7, ['4735', '4943', '391', '1951', '8785', '4869', '3971']

Answer: 49433911951878548693971


Question: 1, 3, ['y', '3655', '163', 'F']

Answer:
y3655163