How to read from single LOOKUP table into different variables?

[richard]

LOOKUP A,["Hello!"],B,C

in what way would B differ from C

surely if a=0 then b==c = "H"
surely if a=1 then b==c = "e"

makes zero sense

[CuriousOne]

I want to get two consecutive bytes from one "Hello!" string. How more clear I can say this in other way?

I'll try once again. I need output of this kind from Hello!
A=H
B=e
A=l
B=l
A=o
B=!