from collections import OrderedDict

ordered_dict = OrderedDict()

n = int(input())

for _ in range(n):
    myinput = input()
    try:
        if ordered_dict[myinput]:
            ordered_dict[myinput] += 1
    except KeyError:
        ordered_dict[myinput] = 1
        
print(len(ordered_dict.items()))
for x,y in ordered_dict.items():
    print(y, end=" ")