Fain, Fee and ?

Kioni is speaking lots of things now in sentences, however, she still cannot say a few of the sounds, like 'L' is still 'N', so she says 'yeno' (yellow), 'nini' (lily), 'tunip' (tulip) and for the 'Tr' sound, it turns into 'F'. It is kind of cute, actually, when she says, 'Fain' (train), 'Fee' (tree). But when she says Fire Truck, it becomes Fire ...... Hmmm.... I am not going to write it here, you get it. It is a bit problematic when we are out in a restaurant and a fire truck goes by.