#include<bits/stdc++.h> using namespace std; int main() { int n,d; cin>>n>>d; int a[n],b[n]; cin>>a[n]>>b[n]; for(int i=0;i<n;i++){ int s[2*n]; if(a[i]-b[i]>d||b[i]-a[i]>d){ continue; } else{ s[i]=max(a[i],b[i]); } cout<<s[i]; } return 0; }