What is TCA, TCB, and TCC in satoshi?

Could you please clarify what TCA, TCB, and TCC stand for in the context of satoshi? Are they specific terms related to cryptocurrency or blockchain technology? Satoshi is a subunit of Bitcoin, so it's possible these acronyms relate to some aspect of Bitcoin transactions, wallets, or exchanges. However, without more context, it's difficult to give an accurate description. Could you provide any additional information or context to help me better understand what you're asking about?