fmab is the 망가 faithful version of fma. The original 아니메 went off on it's own course around the 초 season and made up it's own story. FMAB is the 망가 driven version
Think 당신 might be referring to FMAB which stands for Fullmetal Alchemist Brotherhood and that would be the 09 version of the FMA 아니메 which is much closer to the 망가 compared to original version of the series.