1// re2c $INPUT -o $OUTPUT -b 2/*!re2c 3 4a = [aA]; 5b = [bB]; 6c = [cC]; 7d = [dD]; 8 9(a|b|c|d|"e"|'f'|[gG]) { return 1; } 10 11.|"\n" { return -1; } 12 13*/ 14