=LOOKUP(CODE(LEFT(B1,1)),45217+{0,36,544,1101,1609,1793,2080,2560,2902,3845,4107,4679,5154,5397,5405,5689,6170,6229,7001,7481,7763,8472,9264},{"A","B","C","D","E","F","G","H","J","K","L","M","N","O","P","Q","R","S","T","W","X","Y","Z"})
可以了
A1:
=LOOKUP(CODE(B1),45217+{0,36,544,1101,1609,1793,2080,2560,2902,3845,4107,4679,5154,5397,5405,5689,6170,6229,7001,7481,7763,8472,9264},{"A","B","C","D","E","F","G","H","J","K","L","M","N","O","P","Q","R","S","T","W","X","Y","Z"})
这是看来的答案,你自己研究一下吧!
221.224.13.*与loveruby521的公式都可以,前一个的更简洁些。