// original: https://yukicoder.me/submissions/626069

#pragma GCC optimize("Ofast")
#pragma GCC target("avx2")

char*mmap();
#define RD(v) int v=0;{int _c;while(_c=*rp++-48,_c>=0)v=v*10+_c;}

char wbuf[1<<28];
#define WTHI(v) {int _z=v,_n=0;long _d;while(++_n,_d=_d<<8|0x30|_z%10,_z/=10);*(long*)wp=_d;wp+=_n;}
#define WTLO(v) {int _z=v,_n=8;long _d;while(_d=_d<<8|0x30|_z%10,_z/=10,--_n);*(long*)wp=_d;wp+=8;}
#define WT(v) if(v>=100000000){WTHI(v/100000000);WTLO(v);}else{WTHI(v);}

#define L 100001
int V[L],X[L];
int root(int a){
	if(V[a]<=0) return a;
	int p=V[a], r=root(p);
	V[a]=r; X[a]^=X[p];
	return r;
}
int merge(int r,int c,int y){
	int rr=root(r), rc=root(c);
	if(rr==rc) return X[r]^X[c]^y;
	if(V[rr]<=V[rc]){
		V[rr]+=V[rc]-1; V[rc]=r; X[rc]=y^X[c];
	}else{
		V[rc]+=V[rr]-1; V[rr]=c; X[rr]=y^X[r];
	}
	return 0;
}

int main(){
	char*rp=mmap(0l,1l<<28,1,2,0,0ll);
	RD(N);
	RD(M);
	for(int i=0;i<M;++i){
		RD(a); RD(b); RD(y);
		if(merge(a,b,y)){ write(1,"-1\n",3); _exit(0); }
	}
	char*wp=wbuf;
	for(int i=1;i<=N;++i){ root(i); int x=X[i]; WT(x); *wp++='\n'; }
	write(1,wbuf,wp-wbuf);
	_exit(0);
}