Answer or anser?

I always tell students that English spelling is crazy. Like it's there to get them saying sounds that shouldn't be there! Why is "answer" with a w? Or "write" for that matter? Why "listen" with a t? Why "walk" with the letter L? The fun starts when my students look at me with pure disbelief when I tell them the correct pronunciation. Some even refuse to believe me! I'm only pulling their leg, or so they think. What a wonderful crazy language English is!