Underhernineteen

In the quinary numeral system, the number 9 is represented by a single digit - 14. This system uses digits from 0 to 4, and each digit corresponds to a power of five. Therefore, the digit 1 in quinary represents five, and the digit 4 represents twenty-five. The digit 14 corresponds to nineteen fives and four ones: $14_{5}=19_{10}$.