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, ['n', 'Q', '8725', '3893']
answer:
nQ8725


question:
2, 4, ['1333', '9897', '5955', '9829']
answer:
989759559829


question:
2, 7, ['6217', 'a', '9745', 'W', 'F', 'N', 'n', 'K', 'b', '7001']
answer:

a9745WFNn


