def main():
    pass_out_number()

def pass_out_number():
    i = input()
    n = int(i.split()[0])
    m = int(i.split()[-1])
    case = [input() for _ in range(n)]
    count = 0
    for case in case:
        case = case.split()
        s = case[0]
        r = int(case[-1])
        if r >= 1200 and s[:4].count('x') >= 1:
            count += 1
    print(count)
            
if __name__ == '__main__':
    main()