with open('input') as f:
    data = [line.strip() for line in f.read().split('\n\n')]

def solve_a(data):
    count = 0
    for group in data:
        answers = set()
        for c in group:
            if c != '\n':
                answers.add(c)
        count += len(answers)
    return count

def solve_b(data):
    count = 0
    for group in data:
        count_map = {}
        for c in group:
            if c == '\n': continue
            if c in count_map:
                count_map[c] += 1
            else:
                count_map[c] = 1
        for k in count_map:
            if count_map[k] == len(group.split()): count += 1
        print(count_map, count, len(group.split()))

    return count


print(solve_a(data))
print(solve_b(data))