Ruudukko

var v = parseInt(process.argv[0]);
if (isNaN(v)) v = parseInt(process.argv[1]);
if (isNaN(v)) v = parseInt(process.argv[2]);
if (isNaN(v)) v = parseInt(process.argv[3]);
if (isNaN(v)) v = parseInt(process.argv[4]);
if (isNaN(v)) v = parseInt(process.argv[5]);
if (isNaN(v)) v = parseInt(process.argv[6]);

var str = '';
for (var y = 0; y < v; y++) {
	for (var x = 0; x < v; x++) {
		if (x == y) {
			str += 1 + ' ';
		} else {
			str += x + 1 + y + ' ';
		}
	}
}
console.log(sub(str));

function sub(str) {
	return str.substring(0, str.length);
}

Test 1

Verdict: WRONG ANSWER

Test 2

Verdict: WRONG ANSWER

Test 3

Verdict: WRONG ANSWER

Test 4

Verdict: WRONG ANSWER

Test 5

Verdict: WRONG ANSWER

Test 6

Verdict: WRONG ANSWER