Column A contains a series of letters, column B contains matching codes for each letter.
We want to create new strings composed of the codes matching each of the letter strings shown in column D.
Use the VLOOKUP and MID functions as shown in the following formula:
=VLOOKUP(MID(D2,1,1),$A$2:$B$7,2,FALSE)&" "&VLOOKUP(MID(D2,2,1),$A$2:$B$7,2,FALSE)&" "&VLOOKUP(MID(D2,3,1),$A$2:$B$7,2,FALSE)
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