For problem statement at 1000-1999/1200-1299/1280-1289/1281/problemB.txt this is a correct solution, but verifier at 1000-1999/1200-1299/1280-1289/1281/verifierB.go ends with test 1 failed:
input:
10
DCDW OTR
RBE EVFSK
HC AD
HI RZSSY
MUMU WKY
XGB XA
HIBZGZ XIKYTW
DWRK FXTH
IZYF TPYJRP
OWUVL ETOR

expected:DCDW
BRE
---
HI
MUMU
BGX
HIBZGZ
DWRK
IZYF
---
got:CDDW
BRE
---
HI
MMUU
BGX
BIHZGZ
DKRW
FZYI
---

exit status 1 can you fix the verifier? ```go
package main

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

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

	var t int
	if _, err := fmt.Fscan(in, &t); err != nil {
		return
	}

	for i := 0; i < t; i++ {
		var s, c string
		fmt.Fscan(in, &s, &c)

		b := []byte(s)
		n := len(b)

		minIndices := make([]int, n)
		if n > 0 {
			minIdx := n - 1
			for j := n - 1; j >= 0; j-- {
				if b[j] < b[minIdx] {
					minIdx = j
				}
				minIndices[j] = minIdx
			}
		}

		for j := 0; j < n-1; j++ {
			target := minIndices[j+1]
			if b[target] < b[j] {
				b[j], b[target] = b[target], b[j]
				break
			}
		}

		res := string(b)
		if res < c {
			fmt.Fprintln(out, res)
		} else {
			fmt.Fprintln(out, "---")
		}
	}
}
```