Ex. 2. RegExp crossword "Royal Dinner" (FI|A)+ (YE|OT)K (.)[IF]+ [NODE]+ (FY|F|RG)+ (Y|F)(.)\2[DAF]\1 F O O D F *(U|O|I)T[FRO]+ I T F O R [KANE]*[GIN]* A K I N G