起訖非空之間 找空白位置 (15036)

H2:J7{=INDEX($1:$1,SMALL(IF((COLUMN($A:$E)>=MATCH(1=1,$B2:$F2>0,))*(COLUMN($B:$F)<=MAX(($B2:$F2>0)*COLUMN($B:$F)))*($B2:$F2=0),COLUMN($B:$F),99),COLUMN(A1)))&""