All passwords of this safe are a combination of 4 Arabic numerals and 4 English letters. Known: (1) If the 4 English letters are not arranged consecutively, the sum of the numbers in the password combination is greater than 15; (2) If the 4 English letters are arranged consecutively, the sum of the numbers in the password combination is equal to 15; (3) ) The sum of the numbers in the password combination is either equal to 18 or less than 15.
a possible combination of passwords?
18ac42de