44"

Today was a long day, flying from Edinburgh to Winnipeg via London and Toronto. So I thought at least 44 will be nice and easy with all the airport gate numbers etc. Not so. Either the numbers didn't go high enough, or they were too high, the lower ones being in a different terminal.

In the end I had to make do with this (thanks to esme for spotting it) at our final stop for the day, about 10 minutes before zonking out.