#include<bits/stdc++.h>
using namespace std;

int main(){
	int t;
	cin>>t;
	for(int i=0;i<t;i++){
		int n;
		cin>>n;
		int temp=n%7;
		if(n==0){
			cout<<-1;
		}else if(temp==0){
			for(int j=0;j<n/7;j++){
				cout<<8;
			}
		}else if(n==1){
			cout<<-1;
		}else if(temp==1){
			cout<<10;
			for(int j=0;j<(n-8)/7;j++){
				cout<<8;
			}
		}else if(temp==2){
			cout<<1;
			for(int j=0;j<(n-2)/7;j++){
				cout<<8;
			}
		}else if(temp==3){
			if(n==3)cout<<7;
			else if(n==17)cout<<200;
			else if(n==10){
				cout<<22;
			}else if(n==24){
				cout<<2288;
			}else{
				cout<<7;
				for(int j=0;j<(n-17)/7;j++){
					cout<<8;
				}
			}
		}else if(temp==4){
			if(n==11){
				cout<<20;
				continue;
			}else if(n==18){
				cout<<208;
				continue;
			}
			cout<<4;
			for(int j=0;j<(n-11)/7;j++){
				cout<<8;
			}
		}else if(temp==5){
			cout<<2;
			for(int j=0;j<(n-5)/7;j++){
				cout<<8;
			}
		}else if(temp==6){
			cout<<6;
			for(int j=0;j<(n-6)/7;j++){
				cout<<8;
			}
		}else if(n==17){
			cout<<200;
		}
		cout<<endl;
	}
	return 0;
}