60pts求调

#include<bits/stdc++.h>
using namespace std;
int main(){
	int a;
	cin>>a;
	for(int i=1;i<=a;i++){
		int b;
		string c;
		cin>>b;
		if(b<=1){
			cout<<"-1";
			continue;
		}
		if(b==2){
			cout<<"1";
			continue;
		}
		if(b==3){
			cout<<"7";
			continue;
		}
		if(b==4){
			cout<<"4";
			continue;
		}
		if(b==5){
			cout<<"2";
			continue;
		}
		if(b==6){
			cout<<"6";
			continue;
		}
		if(b==7){
			cout<<"8";
			continue;
		}
		if(b==8){
			cout<<"10";
			continue;
		}
		if(b==9){
			cout<<"18";
			continue;
		}
		if(b==10){
			cout<<"22";
			continue;
		}
		if(b==11){
			cout<<"20";
			continue;
		}
		if(b==12){
			cout<<"28";
			continue;
		}
		if(b==17){
			cout<<"200";
			continue;
		}
		if(b==13){
			cout<<"68";
			continue;
		}
		while(b>13){
			b-=7;
			c+='8';
		}
		if(b==13){
			c+="86";
		}
		if(b==12){
			c+="82";
		}
		if(b==11){
			c+="02";
		}
		if(b==10){
			c+="22";
		}
		if(b==9){
			c+="81";
		}
		if(b==8){
			c+="01";
		}
		if(b==7){
			c+="8";
		}
		for(int j=c.size()-1;j>=0;j--){
			cout<<c[j];
		}
		cout<<endl;
	}
	return 0;
}