IF MATCH with multiple lookups

Looking to create an IF(MATCH) formula on Sheet 2 of my workbook that will look up values from 5 columns on Sheet 1and return the corresponding text. For example if the value from column M on Sheet 2 matches any of the values from column J on Sheet 1 it would return "N", if not it would look in column K and if matched anything there it would return D, and so on. The formula I tried below only seems to work for the first value (N), but none of the others.

=IFERROR(IF(MATCH(M2,Sheet1!$J:$J,0)>0,"N", 
IF(MATCH(M2,Sheet1!$K:$K,0)>0,"D", 
IF(MATCH(M2,Sheet1!$L:$L,0)>0,"R", 
IF(MATCH(M2,Sheet1!$M:$M,0)>0,"G", 
IF(MATCH(M2,Sheet1!$N:$N,0)>0,"F", ""))))), "")