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program ass; 
var 
i,j:integer; 
n:=readinteger('n is:'); 
begin
 for i:=1 to 2*n do
 for j:=1 to 2*n do
 begin
 if j<>2*n then
 begin 
 if (n >= j) and (n >= i) then
 write('1 ');
 if (n >= j) and (n < i) then
 write('3 '); 
 if (n < j) and (n >= i) then
 write('2 ');
 if (n < j) and (n < i) then
 write('4 '); 
 end
 else 
 begin 
 if (n < j) and (n >= i) then
 writeln('2');
 if (n < j) and (n < i) then
 writeln('4'); 
 end;
 end;
end.

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