import os
MyPC = os.path.basename(__file__) != "Main.py"
if MyPC:
    from icecream import ic
    ic.disable()
else:
    def ic(*args):
        return None
ic.enable() if MyPC else None
def main():
    n, m = map(int, input().split())
    r, s = [], []
    for _ in range(n):
        a, b = input().split()
        r.append(a)
        s.append(int(b))
    
    count = 0
    for i in range(n):
        if s[i] >= 1200:
            if 'x' in r[i]:
                count += 1
    print(count-1)

if __name__ == "__main__":
    main()