11.input.txt

The first floor contains a strontium generator, a strontium-compatible microchip, a plutonium generator, and a plutonium-compatible microchip.
The second floor contains a thulium generator, a ruthenium generator, a ruthenium-compatible microchip, a curium generator, and a curium-compatible microchip.
The third floor contains a thulium-compatible microchip.
The fourth floor contains nothing relevant.