from collections import OrderedDict

N = int(input())

word_dict = OrderedDict()

for i in range(N):
    word = input()
    if word in word_dict:
        old_word_count = word_dict[word]
        new_word_count = old_word_count + 1
        word_dict[word] = new_word_count
    else:
        word_dict[word] = 1

word_count_list = [ str(word_dict[i]) for i in word_dict ]
print(len(word_count_list))
print(" ".join(word_count_list))