I think there are more than 39. This is what we have so far, in alphabetical order.
Baby You’re A Rich Man
Baby’s In Black
Back In The USSR (or Revolution. Or both!)
Birthday
Blackbird
Carry That Weight
Come Together
Dr Robert
Drive My Car
Eight Days A Week
Fixing A Hole
Fool On The Hill
Glass Onion
Hello Goodbye
Help
Helter Skelter
Her Majesty
Here Comes The Sun
Here There And Everywhere
I Am The Walrus
I’m Only Sleeping
Let It Be
Long And Winding Road
Lovely Rita
Maxwell’s Silver Hammer
Norwegian Wood
Octopus’s Garden
Penny Lane
Piggies (possibly)
Revolution
She Came In Through The Bathroom Window
She’s Leaving Home
Strawberry Fields Forever
Taxman
Ticket To Ride
Twist And Shout
While My Guitar Gently Weeps
Yellow Submarine
I’m pretty sure I can see another six. That would make 44.
You won’t see me certainly fits, unless anyone comes up with anything better…
As for the van, it has writing next to the marks that look like sacks - although the word is not very sharp, the word that comes to my mind precisely fits the shape of the word, and fits with the images being sacks…
Meanwhile at the moment there’s one remaining one that I can see not yet mentioned: Get back - the instruction being given by the person holding the tocket to ride.