[Sascha]

pawn Код:

new ForbiddenSkin[]
{
  163, 164, 165, 166, 265, 266, 267, 269, 270, 271, 274, 275, 276, 277, 278, 279, 280, 281, 282, 283, 284, 285, 286, 287, 288
};

on your dialog:

pawn Код:

for(new n=0; n<sizeof(ForbiddenSkin); n++)
{
  if(strval(inputtext) == ForbiddenSkin[n])
  {
    SendClientMessage(playerid, 0x999999AA, "Forbidden Skin");
  }
}

try this