a,b=map(int,input().split()) begin=1*10**(a-1) end=1*10**a xiao=0 da=0 flag=1 ff=1 for i in range(begin,end): if i//10+i%10==b and flag==1: xiao=i flag=0 ff=0 if i//10+i%10==b and flag==0: da=i ff=0 if ff==1: print(-1,-1) else: print(xiao,da)