n = int(input())
x = input()
for i in range (1,n+1):
    A = int(input())
    F = int(input())
    for j in range(1,F+1):
        for k in range(1,A+1):
            print(str(k)*k)
        for k in range(A-1,0,-1):
            print(str(k)*k)
        print()