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:
5, 7, ['L', 'L', '1691', '2221', 'W', '5023', '3925', 'p', '8279', '2293', 'h', '9061', 'r', '2863', 'p', 'U']
answer:
W50233925


question:
1, 6, ['l', '1137', 'c', '3537', 'p', '4561', '2819', '9705']
answer:
l1137c3537p4561


question:
1, 9, ['W', 'a', 'x', '2863', '7469', '9525', 'm', 'y', '2099', '2239', 'x', '6541', '4419', '1751', 'X', '5387', '4043', 'U', 's', 'F', 'I', 'b', 'H', 'v', 'L', 'c', 'x']
answer:

Wax286374699525my2099