asdasd start asdasd asdasdasd asdasdas end asdasdas

adasdas start as asdas dasdasdad asdasddas end qweqwe

asdasd start asdsadsdasddasds sdasdas asdasdasdasd asdasdsa
asdasd asdasdasd end

##</code><code>##

start asdasd asdasdasd asdasdas end
start as asdas dasdasdad asdasddas end
start asdsadsdasddasds sdasdas asdasdasdasd asdasdsa asdasd asdasdasd end

##</code><code>##

open(TST, "test.log") or dir $!;

while (<TST>) {
     chomp;
     if (/start/ .. /end/) {
       s/.*(start.*end).*/$1/m;
       print "$_\n";
     }
}

##</code><code>##

1.asdasd start asdsadsdasddasds sdasdas asdasdasdasd asdasdsa
2.asdasd asdasdasd end

##</code><code>##

start
adasd
asdasd
asdasd
asdas
end