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:
4, 18, ['r', 'W', '2683', '1451', 'b', '5295', '6037', 's', 'o', 'p', 'S', 'C', 'U', 'z', 'K', '6539', '4519', 'T', 'i', '4467']
answer:
1451b52956037sopSCUzK65394519T


question:
3, 5, ['f', '3797', 'm', 'Q', 'g', '1147']
answer:
mQg


question:
3, 7, ['w', 'W', '7055', 'l', 'N', 'y', '8609', '2231', '851', '8085', '6579', 'i']
answer:

7055lNy8609