# Programmer: Sikder Huq and Sriram Pemmaraju
# Date: Feb 16, 2014

outputString = "" # initially the outputString is empty
count = int(raw_input()) # read the first count

# continue to read count and process until count is zero
while count != 0:
    # if count is != 0 then there will be a string in the next line.
    # read that into a variable called st
    st = raw_input() 

    # Append as many copies of st to outputstring as specified by count
    i = 0
    while i < count:
        outputString = outputString + st
        i = i + 1

    # read the next count before returning to the top of while-loop
    count = int(raw_input())

print outputString