I'm pretty sure the phrase itself played a part here. Just imagine it - you've figured out something that fits using only one letter. You're probably feeling

I'm pretty sure the phrase itself played a part here. Just imagine it - you've figured out something that fits using only one letter. You're probably feeling a little bit excited, but it's a bit of a gamble to guess - how many other phrases might fit? Do you have a good feeling about it...?