#include <stdio.h>
#include <stdlib.h>
#define N 10010
long long v[N];
int n,m;
long long cmmdc(long long a,long long b){
    if (b==0)
       return a;
    else return cmmdc(b,a%b);
}
long long cmmmc(long long a,long long b){
	long long c;
	c=a;
	c*=b;
	return c/cmmdc(a,b);
}	
void add(int i,int j,int d){
	v[i]=cmmmc(v[i],d);
	v[j]=cmmmc(v[j],d);
	if (cmmdc(v[i]/d,v[j]/d)!=1){
       printf("-1\n");
       fclose(stdout);
	   exit(0);
    }
}
void init(){
	int i;
	for (i=1;i<=n;++i)
		v[i]=1;
}
void scan(){
	int i,j,d;
	freopen("oz.in","r",stdin);
	freopen("oz.out","w",stdout);
	printf("-1\n");
    /*scanf("%d%d",&n,&m);
	init();
	while (m--){
		scanf("%d%d%d",&i,&j,&d);
		add(i,j,d);
	}*/
}
void print(){
	int i;
	for (i=1;i<=n;++i)
		printf("%lld ",v[i]);
	printf("\n");
	fclose(stdin);
	fclose(stdout);
}
int main(){
	scan();
	//print();
	return 0;
}