123.cpp

#include <iostream>
using namespace std;

int main() {
    string a , b;
    int N;
    cin >> N >> a >> b ;
    bool will = true;
    for(int i=0;i<N;i++) {
        if(a[i]=='0'){
            if(i!=0||i!=N-1){
                if(b[i]=='1'&&(b[i+1]=='1'||b[i-1]=='1')){
                    will = false;
                }
            }else if(i==0){
                if(b[i]=='1'&&(b[i+1]=='1')){
                    will = false;
                }
            }else{
                if(b[i]=='1'&&b[i-1]=='1'){
                    will = false;
                }
            }
        }
    }
    if(will){
        cout << "FENESTRATION FORTIFICATION FAILURE!\n";
    }else{
        cout << "FENDED OFF!\n";
    }
    return 0;
}