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:
10, 12, ['6999', '2223', '7751', 'b', '1379', 'e', 'v', '6749', 'k', '6697', '9', 'K', '5093']
answer:
66979K


question:
1, 1, ['I', '125']
answer:
I


question:
1, 4, ['3839', '2871', 'X', 'E', 'a', '5523', 'j', '6745']
answer:

38392871XE