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R, 86 bytes

x=utf8ToInt(scan(,''));s=sapply;cat(gsub(" .+"," ",s(s(x,`:`,97),intToUtf8)),sep="\n")

Ungolfed:

x=utf8ToInt(scan(,'')) #Takes input, converts to ASCII
s=sapply; #Alias sapply function to save a byte
 s(x,`:`,97) #Create vector from 97 to respective ASCII value
 s( ,intToUtf8) #Convert to character
 gsub(" .+"," ", ) #Removes everything after space
cat( ,sep="\n") #Outputs to console

Try it online!

Could likely be golfed.

NOTE: It does not use recursion. I do not know whether that would be shorter or not. I'll experiment later.