```go
package main

import (
	"bufio"
	"fmt"
	"os"
	"strings"
)

func main() {
	in := bufio.NewReader(os.Stdin)
	out := bufio.NewWriter(os.Stdout)
	defer out.Flush()

	var t int
	fmt.Fscan(in, &t)
	for i := 0; i < t; i++ {
		var n int
		fmt.Fscan(in, &n)
		if n == 1 || n == 3 {
			fmt.Fprintln(out, "-1")
		} else if n%2 == 0 {
			fmt.Fprint(out, strings.Repeat("3", n-2))
			fmt.Fprintln(out, "66")
		} else {
			fmt.Fprint(out, strings.Repeat("3", n-5))
			fmt.Fprintln(out, "36366")
		}
	}
}
```