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, 11, ['g', 'H', 'O', 'y', 'd', 'U', 'K', 'I', '2231', '6271', 'U']
answer:
6271U


question:
3, 4, ['9137', '2037', 'F', 'v', 'j', 'e', 'q', '9259', 't', '3417', '5783', 'Y', 'X', '2675', 'Q', 'q', '555']
answer:
Fv


question:
7, 20, ['415', 'S', 'A', '7643', '1443', '1275', 'r', '1655', 'm', 'p', '2613', 'o', 'x', 'Z', '4683', 'A', '855', 'Z', 'k', '1935', 'A', '2705', '5139', '9511', '4815', '6491']
answer:

r1655mp2613oxZ4683A855Zk1935