不重複 找 5個 (11246)

D1:H16=IFERROR(LOOKUP(1,0/(COUNTIF($C1:C1,$B$1:$B1)=0),$B$1:$B1),"")

J2 {=SMALL(IF(COUNTIF(OFFSET(B1,,,ROW(1:16)),B1:B16)=1,ROW(1:16)),5)

J9 {=LARGE(IF(COUNTIF(B:B,B1:B16)=COUNTIF(OFFSET(B1,,,ROW(1:16)),B1:B16),ROW(1:16)),5)