You may try this Array Formula...
In F3
and then copy across and down.![]()
=IFERROR(INDEX(B$3:B$10,SMALL(IF(FREQUENCY(MATCH($B$3:$B$10&$C$3:$C$10,$B$3:$B$10&$C$3:$C$10,0),ROW($B$3:$B$10)-ROW($B$3)+1)>0,ROW($B$3:$B$10)-ROW($B$3)+1),ROWS(F$3:F3))),"")
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