N = int(input())
for i in range(N):
    A,B = [int(i) for i in input().split()]
    if A <= B or A < 33:
        print(-1,-1)
    else:
        if A%11 != 0:
            AA = [A%11,11,11,11]
            #A -= A%11
            BB = [11]
            B -= 11
            BB += [10]*(B//10)
            BB += [B%10] 
        else:
            AA = [11,11,11]
            BB = [10]*(B//10) + [B%10]
        BB += [0] * (len(AA)-len(BB))
        for i in range(len(AA)):
            print(AA[i],BB[i])