instruction:
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:
1, 2, ['D', '5207']
answer:
D5207


question:
1, 7, ['a', 't', 'e', '9279', 'x', 'L', 'i', 'e', 'J', 'g', 'm', '2517', '8937', 'X', '7151', 'u', '4787']
answer:
ate9279xLi


question:
8, 11, ['5431', '1923', 'q', '3877', 'V', '8511', 'y', '7705', '4121', '9815', 'L', 'Z', 'l', 'f', 'u', 'f', 'K', '2969', 'b', '8377', '7063']
answer:

770541219815L