Ruudukko

l1 = int(input())
#li = [[x,x+1] for x in range(1,l1,2)]
#if l1 % 2 == 0:
 #   for x in range(len(li)):
  #      print(" ".join(map(str,[" ".join(map(str,x)) for x in li])))
   #     print(" ".join(map(str,[" ".join(map(str,x[::-1])) for x in li])))
    #    li = li[1:]+li[:1]
li = []
for x in range(l1):
    li2 = []
    y = 0
    count = 0
    while len(li2) != l1:
        count += 1
        for t in range(1,2*l1):
            if t not in li2 and t not in [z[y] for z in li]:
                li2.append(t)
                y += 1
               # print("adding",t)
                break
            #if count > 2*l1:
                #-
    li.append(li2)
print("\n".join(map(str,[" ".join(map(str,x)) for x in li])))

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED