#include<bits/stdc++.h> using namespace std; int n,m,L,s,t; int a,b,k; inline long long read(){ register long long x=0,f=0; register char t=getchar(); while(t<'0'||t>'9')f^=(t=='-'),t=getchar(); while(t>='0'&&t<='9')x=(x<<3)+(x<<1)+(t^48),t=getchar(); return f?-x:x; } int main(){ n=read(),m=read(),L=read(),s=read(),t=read(); while(m--){ a=read(),b=read(),k=read(); } printf("NO\n"); return 0; }