A list of the three-letter abbreviations of the sets which are currently in Standard.
ORI, PMA, JMP, WOE, LCI, MKM, OTJ, PM2, BLB, DSK, FDN, DFT, TDM, RVR, EOE, LRW, SHM, ECL, MOR, EVE, SOS, TSP, PLC, FUT
