It's very normal to make mistakes with k-p-t, but it's good to know it

Verbityypit 3 ja 4

In this verb type, the strong/weak types are reversed. Usually the infinitive is "strong" and the conjugated form is "weak", but with these verb types it's the other way around. For example, "jutella" (to chat) is weak in the infinitive form, then the conjugated forms are:

Typpi 3 (jutella, t->tt)

mä juttelen
sä juttelet
hän juttelee
etc....

Typpi 4 (maata, t->k)

mä makaan
sä makaat
hän makaa
etc...