You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: 1660E_test.go
    path of file: ./repos/codeforces-go/main/1600-1699
    
    the code of the file until where you have to start completion: package main

import (
	"github.com/EndlessCheng/codeforces-go/main/testutil"
	"testing"
)

// https://codeforces.com/contest/1660/problem/E
// https://codeforce
    
func TestCF1660E(t *testing.T) {
	// just copy from website
	rawText := `
inputCopy
4

3
010
011
100

5
00010
00001
10000
01000
00100

2
10
10

4
1111
1011
1111
1111
outputCopy
1
0
2
11`
	testutil.AssertEqualCase(t, rawText, 0, CF1660E)
}