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:
3, 9, ['y', '5877', '5963', '7733', 'c', 'U', '9497', 'X', '4111', '5007', 'h', '6249', 'e', 'G', '1391', '5707', '2877']
answer:
59637733cU9497X4111


question:
4, 16, ['l', 'e', 'g', '1367', '835', 'P', '9523', 'X', 'O', '6423', 'A', 'w', '2597', 'K', '6123', 's', 'c']
answer:
1367835P9523XO6423Aw2597K6123s


question:
15, 16, ['b', '5673', '451', '4243', 'd', 'Z', '3537', '5655', '2661', 'K', '8859', 'j', '7961', '429', 'g', '817', 'D', '2385']
answer:

g817


