英语翻译That boy said to me that that that that that girl wrote

那个男孩告诉我,那女孩在黑板上写了个M是错的
That boy：那个
said to me that ：that是宾语从句的关系词
在这之后的三个that没有意思
that girl ：那个
that blackboard 这里之前应该有个介词on,在黑板上的意思,这里的that依旧是：这那的意思