```go
package main

import (
	"bufio"
	"fmt"
	"os"
	"sort"
)

type FastScanner struct {
	r *bufio.Reader
}

func NewFastScanner() *FastScanner {
	return &FastScanner{r: bufio.NewReader(os.Stdin)}
}

func (fs *FastScanner) NextInt() int {
	sign := 1
	val := 0
	c, err := fs.r.ReadByte()
	for (c < '0' || c > '9') && c != '-' {
		if err != nil {
			return 0
		}
		c, err = fs.r.ReadByte()
	}
	if c == '-' {
		sign = -1
		c, err = fs.r.ReadByte()
	}
	for c >= '0' && c <= '9' {
		val = val*10 + int(c-'0')
		c, err = fs.r.ReadByte()
		if err != nil {
			break
		}
	}
	return sign * val
}

type Item struct {
	r   int
	idx int
}

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

	t := in.NextInt()
	for ; t > 0; t-- {
		n := in.NextInt()
		s1 := in.NextInt()
		s2 := in.NextInt()
		items := make([]Item, n)
		for i := 0; i < n; i++ {
			items[i] = Item{r: in.NextInt(), idx: i + 1}
		}
		sort.Slice(items, func(i, j int) bool {
			if items[i].r == items[j].r {
				return items[i].idx < items[j].idx
			}
			return items[i].r > items[j].r
		})

		a := make([]int, 0)
		b := make([]int, 0)

		for _, it := range items {
			w1 := int64(s1) * int64(len(a)+1)
			w2 := int64(s2) * int64(len(b)+1)
			if w1 <= w2 {
				a = append(a, it.idx)
			} else {
				b = append(b, it.idx)
			}
		}

		fmt.Fprint(out, len(a))
		for _, v := range a {
			fmt.Fprint(out, " ", v)
		}
		fmt.Fprintln(out)

		fmt.Fprint(out, len(b))
		for _, v := range b {
			fmt.Fprint(out, " ", v)
		}
		fmt.Fprintln(out)
	}
}
```