const n = 4;
var i, x: integer;
var maximum, count: integer;
begin
count := 0; maximum := 999;
for i:=1 to n do begin
read( x );
if x mod 3 = 0 then begin
count := count + 1;
if x < maximum then maximum := x;
end;
end;
if count > 0 then begin
writeln(count);writeln(maximum);
end
else writeln('NO');
end.
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