我只是你的甲乙丙丁
[wŏ zhĭ shì nĭ de jiă yĭ bĭng dīng]
'I Am Just One Of Your ABCs (Among The Crowd).' This implies a feeling of insignificance, suggesting one views themself as just a part of an interchangeable, forgettable group, lacking uniqueness in another person's eyes.