public class OTPDecryptor extends Translator
{
	/**
	 * Decrypts text with the given key
	 * @param text - text to decrypt
	 * @param key - key to use in decryption
	 * @return decrypted text
	 */
	
	public String process(final String text, final String key)
	{	
		String decrypted = "";
		
		for (int i = 0; i < text.length(); i++)
		{
			decrypted += combine(text.charAt(i), key.charAt(i), '-');
		}
		
		return decrypted;
	}
}

@@ -184,16 +184,33 @@
 ted text
+ or error message
 %0A%09 */%0A%09%0A
@@ -273,16 +273,93 @@
 ey)%0A%09%7B%09%0A
+%09%09String mes = validate(text, key);%0A%09%09%0A%09%09if (!mes.isEmpty())%0A%09%09%09return mes;%0A%0A
 %09%09String

Update OTPDecryptor.java