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: 6, 12, ['W', '7747', '1915', 'Z', '6841', 'U', '7357', 'B', '5029', 'd', '69', 'E']

Answer: U7357B5029d69E


Question: 2, 14, ['1989', 'b', '3375', 'x', 'e', '8063', 't', '2461', '4855', '9491', 'F', 'd', 'U', 'f', '2199', 'd', '8123', 'R', '6731', '3395', '2961', '1001', 's', 'G', '7595', 'I', '7447', '3861']

Answer: b3375xe8063t246148559491FdUf


Question: 10, 16, ['7861', '6401', 'D', 'a', 'Q', 'e', '177', 'b', 'n', '7735', '4821', 'c', 'L', 'X', '4249', 'n', 'o', '9889', '169', 'R']

Answer:
77354821cLX4249n