Good morning,

I'm trying to parse a relatively simple pattern across 4 std::strings,
extracting whatever the part which matches the pattern into a separate
std::string.

In an abstracted sense, here is what I want:
s1=<string1><consecutive number>, s2=<consecutive number><string2>,
s3=<string1><consecutive number>, s4=<consecutive number><string2>

Less abstracted:
s1="apple 1", s2="2 cheese", s3="apple 3", s4="4 cheese"

Actual contents:
s1="lxckvjlxcjvlkjlkje xvcjxzlvcj wqrej lxvcjz ljvl;x czvouzxvcu
j;ljfds apple 1 xcvljxclvjx oueroi xcvzlkjv; zjx", s2="xzljlkxvc
jlkjxzvl jxcvljzx lvjlkj wre 2 cheese", s3="apple 3", s4="kxclvj
xcvjlxk jcvljxlck jxcvl 4 cheese"

How would I perform this pattern matching?