Convert number-ranges to sequence of numbers (e.g. 142-145 to 142, 143, 144, 145)

Hi,

it would be great, if someone more proficiend than I am can help me. I would like to convert a list of ranges of numbers into sequences of these numbers. There are three types, e.g.:

"34f" should be converted to "34 35" (each number in its own cell of course)
"34ff" to "34 35 36"
"34-38" to "34 35 36 37 38"


Thank you very much in advance!
Cheers!

EDIT: Initial post had an error: "34f" should be converted to "34 35" (not to "12 13")