#include<bits/stdc++.h>
using namespace std;

/*
第一种（推荐，好记字又少）
struct student
{
    int num, name;
}stu1, stu2;

bool operator == (student a, student b)
{
    return(a.num == b.num && a.name == b.name);
}

第二种
struct student
{
    int num, name;
    bool operator == (const student &res);
}stu1, stu2;

bool student :: operator == (const student &res)
{
    return(num == res.num && name == res.name);
}
*/

int main()
{
    while(scanf("%d%d%d%d", &stu1.num, &stu1.name, &stu2.num, &stu2.name) != EOF)
    {
        if(stu1 == stu2) puts("Yes");
        else puts("No");
    }

    return 0;
}
//重载过后不会影响 == 号原本的用途。