program zz2;
uses crt;
var k,a,b,c,n:integer;
BEGIN
clrscr;
k:=0;
for a:=1 to 9 do
for b:=0 to 9 do
for c:=0 to 9 do
if ((a+b+c) mod 7=0) and (a mod 7=0) and (b mod 7=0) and (c mod 7=0)
then begin writeln(100*a+10*b+c); k:=k+1;
end;
if k=0 then writeln('net');
readln;
END.