import "errors"

import (
	"errors"
	"unicode/utf8"
)

	if len(a) != len(b) {

	if utf8.RuneCountInString(a) != utf8.RuneCountInString(b) {

	for k := range a {
		if a[k] != b[k] {

	for {
		runea, sizea := utf8.DecodeRuneInString(a)
		runeb, sizeb := utf8.DecodeRuneInString(b)
		if runea != runeb {

		a = a[sizea:]
		b = b[sizeb:]
		if len(a) == 0 || len(b) == 0 {
			break
		}