Practice: LUCKFOUR, MISINT2, CARDSHUF, PUSHFLOW, TWOCOMP, TKCONVEX, FNCS, AMBIDEX, RANKA, SHORTCIR, PARSIN, SHORT2, CONNECT, TAPAIR, CNTDSETS, QTREE6, SEINC, SEAEQ, DIFTRIP, GRAPHCNT, XRQRS, RIN, RIVPILE, ANDOOR, CAVE, EFFPAINT, CHPUZZLE, LEBOXES, GNUM, PRIMEDST, LECOINS, FINDSEQ, FIBTREE, LPARTY, FN, DGCD, CNTHEX, SPMATRIX, TRIPS, LYRC, GERALD07, KITCHEN, MANYLEFT, GTHRONES, TICKETS, DAGCH, MATCH, CUSTPRIM, BWGAME, COT5, LUCKYDAY, BB, MONOPLOY, MINESREV, COOLNUM, DIVIDEN, DEVLOCK, CBAL, REALSET, SEAORD, QRECT, HAMILG, CLONES, TREECNT2, SHORT, SEAARC, STREETTA, PARADE, KALKI, SEAVEC, SEAND2, SEASORT2, MAXRECT, BAKE, TWOROADS, TSUBSTR, QTREE