function Concate(s1, s2: string): string;
begin
Concate := s1 + s2;
end;
var
s1, s2, s3: string;
begin
readln(s1);
readln(s2);
s3 := Concate(s1, s2);
writeln(s3);
end.
function Concate(s1, s2: string): string;
begin
Concate := s1 + s2;
end;
var
s1, s2, s3: string;
begin
readln(s1);
readln(s2);
s3 := Concate(s1, s2);
writeln(s3);
end.