Depositing will at Probate Office - 3 executors but only room for 2 names on envelope

[NichyNoo]

DH and I are depositing our wills at the Probate Office. We have the envelopes to send. On the envelope it asks for the names of the two executors. I'm not sure what to put as we are each other's executors and, in the event that the other has pre-deceased, our fathers act as the 2 executors. So who should we put on envelope where there is space for only two names but we have, in effect, three possible executors??? Any advice?

You put each others names as you are the sole executors. Your fathers are only the substituted executors who only come in to play if you predecease.