const pmi=65;
      pma=90;
var f1,f2:text;
    i:integer;
    a,aa:string;
begin
Assign(f1,'text.in');
Reset(f1);
readln(f1,a);
for i:=1 to length(a) do
    begin
     if ord(a[i])<=pma then
     begin
          if a[i]=' ' then
               begin
               aa:=aa+' ' ;
               end
              else
      if (ord(a[i])>=pmi) then
      aa:=aa+Chr(ord(a[i])+32)
     end
     else
     begin
     aa:=aa+Chr(ord(a[i]));
     end;
    end;
if ord(aa[1])>90 then aa[1]:=Chr(ord(aa[1])-32);
close(f1);
Assign(f1,'text.out');
Rewrite(f1);
write(aa);
write(f1,aa);
close(f1);
end.