5ty45rgrtg

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

int main()
{
    int n,t;
    scanf("%d",&t);
    while(t--)
    {
        scanf("%d",&n);
        vector<int>v;

        if(n<10)
        {
            printf("%d\n",n);
            continue;
        }

        for(int i=9;i>1;i--)
        {
            if(n%i==0)
            {
                while(n%i==0)
                {
                    n/=i;
                    v.push_back(i);
                }
            }
        }
        if(n>1)
            printf("-1\n");
        else
        {
            for(int i=v.size()-1;i>=0;i--)
                printf("%d",v[i]);
            printf("\n");
        }
    }
}