Any ETH address have to start with 0x and include only hexadecimal characters (0123456789abcdef), so the letters r and i can't be existing. Address Kinds: Ethereum addresses are available two styles: externally owned addresses (EOAs) and deal addresses. EOAs are generated by private keys, even though contract addresses are created https://griffinwmwvr.bleepblogs.com/29831045/an-unbiased-view-of-vanityeth