#include<bits/stdc++.h>using namespace std;int main(){ int n,a[21]={0}; cin>>n; for(int i=0;i<3;i++){ int m; cin>>m; a[m]=1; } for(int i=n;i>0;i--){ if(a[i]==0) cout<<"No. "<<i<<"\n"; } return 0;}