I have this string aaa11 bbb1 cccc aaaaa22 bbb2 aaaa444 bbb4 cccc and I want to use a Regex that results into this:

aaa11 bbb1 cccc

aaaa444 bbb4 cccc

I tried this regex a+[0-9]+.+?(b+[0-9]+).+?(?!a+[0-9+]).+?c+ with preg_match_all but it returns:

aaaa11 bbbb1 ccccc

aaaaa22 bbb2 aaaa444 bbb4 cccc

I tried using negative lookahead to prevent a+[0-9+] in the middle but id does not work. How can I accomplish this?