#include <iostream>
#include <vector>
using namespace std;
bool isKadomatsu(int a,int b,int c){
    if(a == b || a == c || b == c)return false;
    return ((b<a && b<c) || (b>a && b>c));
}
int main(){
    vector<int> A(6);
    for(int i = 0; 6 > i; i++){
        cin>>A[i];
    }
    for(int i = 0; 3 > i; i++){
        for(int j = 3; 6 > j; j++){
            swap(A[i],A[j]);
            if(isKadomatsu(A[0],A[1],A[2]) && isKadomatsu(A[3],A[4],A[5])){
                cout << "Yes" << endl;
                return 0;
            }
            
            swap(A[i],A[j]);
        }
    }
    cout << "No" << endl;
}