on _ _

d _ _ z e

d _ x - se _ t

tr _ _ zequat_ _ z equ _ _ zes _ _ z e

dix- h _ _ t

dix - n _ _ f

vin _ _

Which letters are missing to make the numbers 11- 20?

on z e do u z e

d i x - se p t

tr e i zequat o r z e

qu i n zes e i z e

dix- h u i t

dix - n e u fvin g t

Excellent!