#!/usr/bin/env python3

"""
Convert a list with duplicate lines into a list of sorted unique lines.
The output lines will be sorted by their frequency in the input, ordered 
from most frequent to least frequent.
"""

import sys

counts = { }

for line in sys.stdin:
    line = line.strip()
    counts[line] = counts.get(line, 0) + 1

for key, ignored_val in sorted(counts.items(), 
                               key=lambda pair: pair[1], reverse=True):
    print("%s" % key)