判斷字首 顯示指定值 (14869)

C2=IFERROR(LOOKUP(1,0/(LEFT(B2,{1,2})-{8,18}=0),{9876,1234}),B2)

F2=IFERROR(LOOKUP(1,0/(LEFT(B2,{1,2})-{8,18}=0),{9876,1234}),TEXT(B2,"000000"))



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