uses crt;
const fi='bt.inp';
var a:array[1..100]of real;
i,dem:integer;
f1:text;
begin
clrscr;
assign(f1,fi); reset(f1);
dem:=0;
while not eof(f1) do
begin
inc(dem);
read(f1,a[dem]);
if dem mod 2=0 then readln(f1);
end;
for i:=1 to dem do
write(a[i]:4:1,' ':4);
close(f1);
readln;
end.