simulate this circuit – Schematic created using CircuitLab
Try redrawing the circuit with the 'A' connections in a bar at the top and the 'B' connections in a bar at the bottom (or use left/right).
They've deliberately made it confusing.
If you're redrawing, here's a set of guidelines that Olin wrote up:
Rules and guidelines for drawing good schematicsRules and guidelines for drawing good schematics