#!/usr/bin/python3
import sys


def anagrams(dictionary):
    ws = {}
    for word in dictionary:
        ana = ''.join(sorted(word.lower()))
        if ana not in ws:
            ws[ana] = []
        ws[ana].append(word)

    for ana in sorted(ws, key=lambda k: (len(ws[k]), k), reverse=True):
        yield ws[ana]

if __name__ == '__main__':
    for grams in anagrams(line.strip() for line in open(sys.argv[1])):
        if len(grams) == 1:
            break

        print(' '.join(grams))