#![allow(unused_imports)]
#![allow(non_snake_case, unused)]

use std::cmp::*;
use std::collections::*;
use std::ops::*;

// https://atcoder.jp/contests/hokudai-hitachi2019-1/submissions/10518254

macro_rules! eprint {
	($($t:tt)*) => {{
		use ::std::io::Write;
		let _ = write!(::std::io::stderr(), $($t)*);
	}};
}
macro_rules! eprintln {
	() => { eprintln!(""); };
	($($t:tt)*) => {{
		use ::std::io::Write;
		let _ = writeln!(::std::io::stderr(), $($t)*);
	}};
}
macro_rules! dbg {
	($v:expr) => {{
		let val = $v;
		eprintln!("[{}:{}] {} = {:?}", file!(), line!(), stringify!($v), val);
		val
	}}
}

macro_rules! mat {
	($($e:expr),*) => { Vec::from(vec![$($e),*]) };
	($($e:expr,)*) => { Vec::from(vec![$($e),*]) };
	($e:expr; $d:expr) => { Vec::from(vec![$e; $d]) };
	($e:expr; $d:expr $(; $ds:expr)+) => { Vec::from(vec![mat![$e $(; $ds)*]; $d]) };
}

macro_rules! ok {
	($a:ident$([$i:expr])*.$f:ident()$(@$t:ident)*) => {
		$a$([$i])*.$f($($t),*)
	};
	($a:ident$([$i:expr])*.$f:ident($e:expr$(,$es:expr)*)$(@$t:ident)*) => { {
		let t = $e;
		ok!($a$([$i])*.$f($($es),*)$(@$t)*@t)
	} };
}

pub fn readln() -> String {
	let mut line = String::new();
	::std::io::stdin().read_line(&mut line).unwrap_or_else(|e| panic!("{}", e));
	line
}

macro_rules! read {
	($($t:tt),*; $n:expr) => {{
		let stdin = ::std::io::stdin();
		let ret = ::std::io::BufRead::lines(stdin.lock()).take($n).map(|line| {
			let line = line.unwrap();
			let mut it = line.split_whitespace();
			_read!(it; $($t),*)
		}).collect::<Vec<_>>();
		ret
	}};
	($($t:tt),*) => {{
		let line = readln();
		let mut it = line.split_whitespace();
		_read!(it; $($t),*)
	}};
}

macro_rules! _read {
	($it:ident; [char]) => {
		_read!($it; String).chars().collect::<Vec<_>>()
	};
	($it:ident; [u8]) => {
		Vec::from(_read!($it; String).into_bytes())
	};
	($it:ident; usize1) => {
		$it.next().unwrap_or_else(|| panic!("input mismatch")).parse::<usize>().unwrap_or_else(|e| panic!("{}", e)) - 1
	};
	($it:ident; [usize1]) => {
		$it.map(|s| s.parse::<usize>().unwrap_or_else(|e| panic!("{}", e)) - 1).collect::<Vec<_>>()
	};
	($it:ident; [$t:ty]) => {
		$it.map(|s| s.parse::<$t>().unwrap_or_else(|e| panic!("{}", e))).collect::<Vec<_>>()
	};
	($it:ident; $t:ty) => {
		$it.next().unwrap_or_else(|| panic!("input mismatch")).parse::<$t>().unwrap_or_else(|e| panic!("{}", e))
	};
	($it:ident; $($t:tt),+) => {
		($(_read!($it; $t)),*)
	};
}

pub fn main() {
	let _ = ::std::thread::Builder::new().name("run".to_string()).stack_size(32 * 1024 * 1024).spawn(run).unwrap().join();
}

const MOD: usize = 1_000_000_007;
const INF: f64 = std::f64::MAX/2.0;

fn solve() {
    let n = read!(usize);
    let abc = read!([i64];n);
    let total = 1<<n;
    let mut dp = vec![vec![vec![0;total];3];n];
    for i in 0..n {
        for j in 0..3 {
            let idx = 1<<i;
            dp[i][j][idx] = abc[i][j];
        }
    }
    for i in 0..total {
        for x in 0..n {
            if ((i>>x)%2)==0 {
                continue;
            }
            for y in 0..3 {
                let height = abc[x][y];
                let vmin = min(abc[x][(y+1)%3], abc[x][(y+2)%3]);
                let vmax = max(abc[x][(y+1)%3], abc[x][(y+2)%3]);
                for a in 0..n {
                    if a==x {
                        continue;
                    }
                    if ((i>>a)%2)==0 {
                        continue;
                    }
                    for b in 0..3 {
                        let prev_height = abc[a][b];
                        let prev_vmin = min(abc[a][(b+1)%3], abc[a][(b+2)%3]);
                        let prev_vmax = max(abc[a][(b+1)%3], abc[a][(b+2)%3]);
                        if vmin<=prev_vmin && vmax<=prev_vmax {
                            dp[x][y][i] = max(dp[x][y][i], dp[a][b][i^(1<<x)]+height);
                        }
                    }
                }
            }
        }
    }
    let mut ans = 0;
    for i in 0..n {
        for j in 0..3 {
            for k in 0..total {
                ans = max(ans, dp[i][j][k]);
            }
        }
    }
    println!("{}", ans);
}

fn run() {
    solve();
}