B2{=MID(A2,MIN(IF((MAX(COUNTIF(A2:A29,"*"&MID(A2,ROW(1:20),COLUMN(A:T))&"*")*(MID(A2,ROW(1:20),COLUMN(A:T))<>""))=COUNTIF(A2:A29,"*"&MID(A2,ROW(1:20),COLUMN(A:T))&"*"))*(MID(A2,ROW(1:20),COLUMN(A:T))<>""),ROW(1:20))),MAX(MMULT((MAX(COUNTIF(A2:A29,"*"&MID(A2,ROW(1:20),COLUMN(A:T))&"*")*(MID(A2,ROW(1:20),COLUMN(A:T))<>""))=COUNTIF(A2:A29,"*"&MID(A2,ROW(1:20),COLUMN(A:T))&"*"))*(MID(A2,ROW(1:20),COLUMN(A:T))<>""),ROW(1:20)^0)))