Practice: RIN, GNUM, TWOROADS, TUPLES, BIKE, MGCH3D, TREEPATH, EASYEX, HAMILG, CHEFBOOK, TREECNT2, LPARTY, XRQRS, FNCS, SEAORD, TRIPS, BTREE, QRECT, SIGFIB, SEAEQ, ANUDTQ, SEINC, CNTDSETS, TAPAIR, QTREE6, FN, LECOINS, DIFTRIP, PARADE, MAGIC, GTHRONES, MATCH, TSUBSTR, STRQUER, BINOMSUM, CIELQUAK
MARCH18B: CHEGLOVE, BIGSALE, MIXCOLOR, MINEAT, XXOR, MINVOTE, PSHTRG, EMBDTREE
APRIL18B: CHEFWORK, AVGPR, WGHTNUM, GOODPREF, HIGHWAYC, CUTPLANT, VAIMIN, CHEFPAR
JUNE18A: VSN, TWOFL, WRKWAYS, ARCTR, BUILDIT, BIBOARD
IOITC181: CIRCINTE, KPERFMAT, CYCLECOL