Hi, was hoping you could help me interpret the expert flyer output for my flight tomorrow:

F0 A0 J0 C0 I0 O0 P0 Y0 E0 R0 W0 M0B0 U0 K0 H0 Q0 L0 T0 V0 X0

Does that mean there wont be a chance for op-ups (not necessarily for me, just curious)? Im assuming it's overbooked, so how is it handled? Also it seems it's still possible to buy a business or fist ticket for tomorrow, which is partly why i'm confused.
Additionally, the seat map shows full economy cabin but some free seats in business and first, does that mean it's just people that haven't checked in yet?

Thanks !