def printUntil8(data):
   '''Print the items in a list until the value 8 is encountered'''
   i = 0
   while i < len(data) and data[i] != 8:
      print(data[i])
      i += 1

def main():
   printUntil8([2,6,7,8,3,8,5,9])
   printUntil8([])
   printUntil8([2,9,3])

main()