program Hello;
{.$APPTYPE CONSOLE}
{
uses
SysUtils;
}
function FindNextWordStart(const S: string; var Index: Integer): Boolean;
var
Len: Integer;
begin
Len := Length(S);
while (Index <= Len) and (Ord(S[Index]) <= 32) do Inc(Index);
{Result}FindNextWordStart := (Index <= Len);
end;
function GetWordLength(const S: string; Index: Integer): Integer;
var
StartIdx, Len: Integer;
begin
Len := Length(S);
StartIdx := Index;
while (Index <= Len) and (Ord(S[Index]) > 32) do Inc(Index);
{Result}GetWordLength := (Index - StartIdx);
end;
procedure DeleteWord(var S: String; Index, WordLen: Integer);
var
StartIdx, Len: Integer;
begin
Len := Length(S);
StartIdx := Index;
Inc(Index, WordLen);
while (Index <= Len) and (Ord(S[Index]) <= 32) do Inc(Index);
Delete(S, StartIdx, Index - StartIdx);
end;
var
UserString: string;
StartIdx, WordLen: Integer;
begin
Writeln('Enter the string:');
Readln(UserString);
Writeln('Input String: ', UserString);
StartIdx := 1;
while FindNextWordStart(UserString, StartIdx) do
begin
WordLen := GetWordLength(UserString, StartIdx);
if WordLen > 4 then
DeleteWord(UserString, StartIdx, WordLen)
else
Inc(StartIdx, WordLen);
end;
Writeln('Result String: ', UserString);
end.
