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, 3, ['1963', '8375', 'l', '2629', '2987']
answer:
19638375l


question:
7, 8, ['9131', 'a', '1233', 'B', '2501', 'b', '7551', '3155', 'K', 'K', '2205', 'H', '2059', '6079', '6225', '9781', '5759', 'a', 'W', '8557', 't', 'j']
answer:
75513155


question:
3, 5, ['j', 'L', '6949', '3441', 'e', '8219']
answer:

69493441e