Uses Crt;

var
  cmd: string;
  nxt: char;

begin
repeat;
readln(cmd);
cmd:=Upcase(cmd);
if NOT cmd[2]=':' then
  begin
  break;
  writeln('Incorrect command!');
  end
else
if NOT cmd[3]='\' then
  begin
  break;
  writeln('Incorrect command!');
  end
else
case cmd[1] of
'a':
  begin

  end;
'b':
  begin

  end;
'c':
  begin

  end;
'd':
  begin

  end;
'e':
  begin

  end;
'f':
  begin

  end;
else
  begin
  break;
  writeln('Incorrect command!');
  end;
end;
Readln;
end.