G or C

Thanks for the help! Now I have another silly question-I tryed to add a 5 dollar bill twice in the '86 series ,and nothing happened.I thought it started with a G -could it be that it is a C and there isn't any G's….or what? This is an interesting site! Thanks.

I'm back on again,and saw there is G bills,I entered it again-this time it did work.