文本过滤和向另一列添加单词的公式是什么？

There are hospital names and medicine centers on my excel table on C column. I want to add word "hast" for the lines in which there are hospital names in the F column. What is the formula for this? I could do this by text filtration, yet I really wonder what the formula is for this. Thank you so much.There are hospital names and medicine centers o