Okay, I've observed some very simple things about reCaptcha. You all might already know these:

1. One word of the two words in the captcha is known & another one is unknown (you all obviously know this). However, it cannot be said which word is known & which is unknown. Sometimes the first is unknown, sometimes the second one.

2. It is important to get the known word right. But it is not important to get the unknown word right.

3. If you could count the number of letters in the unknown word & put as many spaces as the number of letters, the captcha will still be solved.

I am not a programmer so I can't give any hint that way. But let's see how we could approach the problem:

1. Identify the known word. Mostly by trial and error. Let the plugin always think that the first word is known word. If not, the captcha refreshes.

2. Decrypt the known (first) word.

3. Count the number of letters in the second (unknown) word. Put as many spaces as the letters
in the word +1 extra space for the space between the two words.