ارسال شماره 954
a,b,c,d = map(int,input().split())
if a == b and c == d:
print("YES")
elif a == c and b == d:
print("YES")
elif a == d and b == c:
print("YES")
else:
print("NO")
a,b,c,d = map(int,input().split())
if a == b and c == d:
print("YES")
elif a == c and b == d:
print("YES")
elif a == d and b == c:
print("YES")
else:
print("NO")