单元格a1:aaaa,单元格b1:aaaa,bbbb,cccc,想求一个公式,能展示b1中除去a1的部分,即最后展示的结果为:bbbb,cccc
greparray(split(B1,","),inarray(item,split(A1,","))=0)
GREPARRAY(split(b1,","), INARRAY(item,split(a1,",")) = 0)