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l,jame=map(int,input().split()) len2=l res_max="" res_komaki=0 def max(jame2): global l global res_max global res_komaki while(jame2>=10) : jame2-=9 res_max+=str(9) l-=1 if jame2<=9 : res_max+=str(jame2) l-=1 res_komaki=int(res_komaki)+int(res_max)-1 for i in range(l) : res_max+="0" return(res_max) def min(jame3) : global res_komaki global l if l>=1 : minn=str(res_komaki)+"0"*(l-1)+"1" return(minn[::-1]) else : minn=str(int(res_komaki)+1) return(minn[::-1]) maxx=max(jame) if int(res_max)<=0 : print(-1,-1) else : print(maxx,min(jame))
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