.htaccess - htaccess: replace hypen with plus sign and Redirect -

i have question on redirect url + replacing hypen plus sign before redirect

http://www.example.com/new-items/school-first-item/school-second-item

i want redirect above url http://www.example.com/web/school+second+item

here rule, able redirect, not sure how replace hypen plus before 301 redirect

rewriterule ^/?new-items/?([^/]+)/([^/]+) http://%{http_host}/web/$2 [r=301,nc,l,ne] 

try adding before rule have:

rewriterule ^new-items/?([^/]+)/(.*)-(.*)$ /new-items/$1/$2+$3 [l,r]