#
# A function that computes the mode of a list
#
# Parameters:
#   data: list of data items
#
# Returns:
#   mode_value: the mode of the list
#   max_count: number of occurences of the mode
#
def mode(data):
   #
   #  For each value in the list
   #
   counts = {}
   for i in data:
     #
     #  If the item is already in the dictionary, increase its value by 1.
     #  Otherwise, add it to the dictionary with a count of 1.
     #
     if (i in counts.keys()):
       counts[i] = counts[i] + 1
     else:
       counts[i] = 1

   #
   # if data is empty, set max_count to 0 (indicating no mode)
   #
   if (len(counts) == 0):
      mode_value = ""
      max_count = 0
   else :
      #
      #  Find the largest item count in the dictionary
      #
      max_count = max(counts.values())

      #
      #  Find the key that has the largest value
      #
      for i in counts.keys():
        if (counts[i] == max_count):
          mode_value = i

   return (mode_value,max_count)


def main():
   #
   #  Read all the values from the user and store them in a list
   #
   items = []
   item = raw_input("Enter something (return to exit): ")
   while (item != ""):
      items.append(item)
      item = raw_input("Enter something (return to exit): ")

   (mode_value,mode_count) = mode(items)
   if (mode_count == 0):
      print "Empty list (no mode)"
   else:
      print "The mode of the list is",mode_value,"with a count of",mode_count

main()