Complete the last line in each of the following five series:
Puzzle 1:
"Using" is E
"Desist" is I
"Visits" is E
"Design" is ???
Puzzle 2:
"Asia" is H
"Cuffs" is S
"Ender" is I
"Redness" is F
"Fuchsia" is ???
Puzzle 3 (advanced):
"Pro-tem" and "row" are H
"Ties" is K
"Cohesion" is A
"Casino" is E
"Hocks" is either a word, name, ??? or ???
Puzzle 4:
"Gross" is W or R
"Assign" is S
"Amassing" is E
"Design" is S
"Amassing" is S
"Arrows" is ??? or ???
Puzzle 5:
"Edna" is I
"Slang" is X
"Siege" is E
"Basin" is X
"Sin" is X
"Sin" is A
"Besiege" is X
"Signals" is ??? and ???
First person to solve all five gets the win.
Hint:
Each ??? stands for a single letter of the English alphabet.
Hint #2:
The puzzles are not related to one another, except that they are all based on the same principle. If you solve any one, you will rapidly solve all the others.
Hint #3, a quite cryptic one:
The very first parts of vague solutions can decode nothing: that's the core of these puzzles.
Hint #4, a more obvious one:
You want another hint?! Nag! Go botanist first, arse ulcer! O my! More clues? Rats! Rifts in a toboggan!