The number XIIV is impossible in Roman numerals, as it features two numbers less than V to the direct left of V. The Roman numeral which represents the number 5 - (1 + 1) = 3 less than 10 (X) = 13, is XIII.
I II III IV V VI VII IIX IX X XI XII XIIV XIV XV if that's what you ment. But u can go higher than that