nginx重写删除子目录规则301

我希望从URL中删除某些子目录

所以

到

我有20多个店名

我试过了，但没有成功

rewrite ^/storenamea(.*)$ $1 last;
rewrite ^/storenamea(.*)$ /$1 last;

location ~ ^/storenamea/ {
    rewrite ^/storenamea(.*)$ $1 last;
}

mydomain/categorymain/subcategory
mydomain/product-page-name
mydomain/
mydomain or mydomain/

rewrite ^/storenamea(.*)$ $1 last;
rewrite ^/storenamea(.*)$ /$1 last;

location ~ ^/storenamea/ {
    rewrite ^/storenamea(.*)$ $1 last;
}