splited_line = input().split()
human_num = int(splited_line[0])
question_num = int(splited_line[1])

ng_num = 0
for i in range(human_num):
    splited_line = input().split()
    question_result = splited_line[0]
    rate = int(splited_line[1])

    if rate < 1200:
        continue

    for j in range(4):
        if question_result[j] == 'x':
            ng_num += 1
            break

print(ng_num)