<?php
 
$s1 = readline("Введіть рядок S1 (до 70 символів): ");
 
if (strlen($s1) > 70) {
  echo "Помилка! Довжина рядка S1 не може перевищувати 70 символів.\n";
  exit;
}
 
$uniqueVowels = [];
$newString = [];
 
for ($i = 0; $i < strlen($s1); $i++) {
  $char = strtolower($s1[$i]);
 
  if (strpbrk($char, "aeiouyj")) {
    if (!in_array($char, $uniqueVowels)) {
      $uniqueVowels[] = $char;
      $newString[] = $char;
    }
  } else {
    $newString[] = $char;
  }
}
 
$result = implode("", $newString);
 
echo "Рядок S1 без дублюючих голосних: " . $result . "\n";
 
?>
 

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