KMYKNWPLKPLRDCX33TATIMSTN2QEIPMFY3QU7CVMQNYPIZZQ6HYAC
HOTNNU7JNR57KX2CXXD5QKT5XB43UWZUCMOIJKCX4JDYCCXF62XAC
T63X37GGBT6PXZMA3MJKNO65FWL7STX62K72Q3RMZDE377BFGCYQC
S4P2B3FPF57HPHTIAYGMPCVKB7573IB5ZBKNXVBTB6ICCPF55WNQC
println('matrix setup: merged $rooms into $self.rooms')