 G was later invented to distinguish between and ; it was originally simply a C with an additional diacritic.K was marginalized in favour of C, which afterward stood for both /ɡ/ and /k/.Probably during the 3rd century BC, the Z was dropped and a new letter G was placed in its position – according to Plutarch, by Spurius Carvilius Ruga – so that afterward, C = /k/, G = /ɡ/.