In a certain language
ABCD is coded as CABF
FGHI is coded as HFGK
UVWkX is coded as WUVZ
How is KLMN coded?
First letter is coded with the 2nd to the right of it in alphabet series
2nd letter is coded with immediate previous letter
3rd letter with immediate previous letter
4th letter is coded with 2nd to the right of it in alphabet series
so KLMN will be coded as MKLP
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