Science Lab
Level     Code
 6        CTTK
11        BDJD
16        ESLE
21        SGMS


Empire of Sand
Level     Code
 6        FHUF
11        FKVF
16        JDBD
21        FYAA


Ashland
Level     Code
 6        TQTD
11        FLJD
16        UFFH
21        BYTV


Sky Haven
Level     Code
 6        TVBY
11        LHRQ
16        NYES
21        THCT