def check(i):
    p = 1<<i
    for _ in range(min(d,4001)):
        np = j = 0
        while p:
            if p&1: np |= e[j]
            p >>= 1
        if np == M: return True
        p = np
    return False

import sys
input = sys.stdin.readline
v,d = map(int,input().split())
e = [int(input()[::-1],2) for _ in range(v)]
M = (1<<v) - 1
for i in range(v):
    if not check(i):
        print("No")
        exit()
print("Yes")