<?php
error_reporting(-1);
 
$input = <<<EOF
МУУ ГООУО ОПП по Удмyртcкой Oбласти объявляет
конкурс на пocтaвку кaнцелярских товаров
на сумму 100500 руб. Sаmple.
EOF;
 
$regexp = array(
	array(
		"wordChecker" => "/\b[А-ЯЁа-яё]+[A-Za-z]+\w*/u",
		"symbolChecker" => "/[A-Za-z]/u",
		),
	array(
		"wordChecker" => "/\b[A-Za-z]+[А-ЯЁа-яё]+\w*/u",
		"symbolChecker" => "/[А-ЯЁа-яё]/u",
		),
	);
foreach($regexp as $rule){
	$matchWords = array();
	preg_match_all($rule['wordChecker'], $input, $matchWords);
	foreach($matchWords[0] as $wrongWord){
		echo "Опечатка в слове {$wrongWord}: ";
		$wrongWord = preg_replace($rule['symbolChecker'],'[$0]', $wrongWord);
		echo $wrongWord."\n";
	}
}

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