Solis herself said that she used the tunnels are connected to the church. It's a good lead.

( he's ... slightly hesitant to suggest this, but, they are in the middle of desperate odds and even more desperate measures. )

We should try and think of potential codes over guessing. Still, I have ... good senses. I might be able to figure out which numbers she was using. I might even be able to hear the difference between the right button and the wrong one.