Hi folks I wouldn't normally ask about magazine puzzles but this one is driving me mad this week. It's 6 sets of letters and you have to add 1 letter.to each set and they should all have some connection I just can't get it by the way its the same letter.in each one The 6 sets of letters are RWANE. AGRLE. IAANR. ELNAC. REDWA. NNCUA I have tried the whole alphabet and can't get 1 letter to fit all Thanks folks