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program Ch2;
{$mode objfpc}
uses
SysUtils,Types;
var
A1,A2,A3:TStringDynArray;
function ConsistentStrings(var Arr:TStringDynArray;
Allowed:AnsiString):Integer;
var
I,J:Integer;
B:Boolean;
begin
Result := 0;
for I := Low(Arr) to High(Arr) do
begin
B := True;
for J := Low(Arr[I]) to High(Arr[I]) do
begin
if not Allowed.Contains(Arr[I][J]) then
begin
B := False;
break
end
end;
if B then Inc(Result);
end
end;
begin
A1 := ['ad','bd','aaab','baa','badab'];
A2 := ['a','b','c','ab','ac','bc','abc'];
A3 := ['cc','acd','b','ba','bac','bad','ac','d'];
WriteLn(ConsistentStrings(A1,'ab'));
WriteLn(ConsistentStrings(A2,'abc'));
WriteLn(ConsistentStrings(A3,'cad'));
end.
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