1# complexities 2a(((b)))c - abc abc 3a(b|(c))d - abd abd 4a(b*|c)d - abbd abbd 5# just gotta have one DFA-buster, of course 6a[ab]{20} - aaaaabaaaabaaaabaaaab aaaaabaaaabaaaabaaaab 7# and an inline expansion in case somebody gets tricky 8a[ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab] - aaaaabaaaabaaaabaaaab aaaaabaaaabaaaabaaaab 9# and in case somebody just slips in an NFA... 10a[ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab](wee|week)(knights|night) - aaaaabaaaabaaaabaaaabweeknights aaaaabaaaabaaaabaaaabweeknights 11# fish for anomalies as the number of states passes 32 1212345678901234567890123456789 - a12345678901234567890123456789b 12345678901234567890123456789 13123456789012345678901234567890 - a123456789012345678901234567890b 123456789012345678901234567890 141234567890123456789012345678901 - a1234567890123456789012345678901b 1234567890123456789012345678901 1512345678901234567890123456789012 - a12345678901234567890123456789012b 12345678901234567890123456789012 16123456789012345678901234567890123 - a123456789012345678901234567890123b 123456789012345678901234567890123 17# and one really big one, beyond any plausible word width 181234567890123456789012345678901234567890123456789012345678901234567890 - a1234567890123456789012345678901234567890123456789012345678901234567890b 1234567890123456789012345678901234567890123456789012345678901234567890 19# fish for problems as brackets go past 8 20[ab][cd][ef][gh][ij][kl][mn] - xacegikmoq acegikm 21[ab][cd][ef][gh][ij][kl][mn][op] - xacegikmoq acegikmo 22[ab][cd][ef][gh][ij][kl][mn][op][qr] - xacegikmoqy acegikmoq 23[ab][cd][ef][gh][ij][kl][mn][op][q] - xacegikmoqy acegikmoq 24