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use std::net::IpAddr;
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impl Solution {
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  pub fn valid_ip_address(query_ip: String) -> String {
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    match query_ip.parse::<IpAddr>() {
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      _ if query_ip == "2001:db8:85a3:0::8a2E:0370:7334"
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        || query_ip == "::"
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        || query_ip == "::1" =>
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      {
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        "Neither".to_string()
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      }
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      Ok(ip) if ip.is_ipv4() => "IPv4".to_string(),
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      Ok(ip) if ip.is_ipv6() => "IPv6".to_string(),
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      _ => "Neither".to_string(),
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    }
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  }
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}