#![allow(non_snake_case, unused_imports, unused_must_use)]
use std::io::{self, prelude::*};
use std::str;

fn main() {
    let (stdin, stdout) = (io::stdin(), io::stdout());
    let mut scan = Scanner::new(stdin.lock());
    let mut out = io::BufWriter::new(stdout.lock());

    macro_rules! input {
        ($T: ty) => {
            scan.token::<$T>()
        };
        ($T: ty, $N: expr) => {
            (0..$N).map(|_| scan.token::<$T>()).collect::<Vec<_>>()
        };
    }

    let N = input!(usize);
    let M = input!(usize);
    let A = input!(isize, N);
    let B = input!(isize, M);

    let mut states = vec![];

    for _ in 0..M {
        let K = input!(usize);
        let mut s = 0u128;

        for _ in 0..K {
            let c = input!(usize) - 1;
            s += 1 << c;
        }

        states.push(s);
    }

    let mut hq = std::collections::BinaryHeap::new();
    hq.push((0, 0));

    for i in 0..M {
        let mut hq_nxt = std::collections::BinaryHeap::new();

        for (mut value, state) in hq {
            hq_nxt.push((value, state));

            let nxt_state = state | states[i];
            value += B[i];

            for j in 0..N {
                if (state >> j) & 1 == 0 && (states[i] >> j) & 1 == 1 {
                    value -= A[j];
                }
            }

            hq_nxt.push((value, nxt_state));
        }

        hq = hq_nxt;

        let mut hq_nxt = std::collections::BinaryHeap::new();

        for _ in 0..1000 {
            let a = hq.pop();

            if let Some(a) = a {
                hq_nxt.push(a);
            }
        }

        hq = hq_nxt;
    }

    let ans = hq.pop().unwrap();
    writeln!(out, "{}", ans.0);
}

struct Scanner<R> {
    reader: R,
    buf_str: Vec<u8>,
    buf_iter: str::SplitWhitespace<'static>,
}
impl<R: BufRead> Scanner<R> {
    fn new(reader: R) -> Self {
        Self {
            reader,
            buf_str: vec![],
            buf_iter: "".split_whitespace(),
        }
    }
    fn token<T: str::FromStr>(&mut self) -> T {
        loop {
            if let Some(token) = self.buf_iter.next() {
                return token.parse().ok().expect("Failed parse");
            }
            self.buf_str.clear();
            self.reader
                .read_until(b'\n', &mut self.buf_str)
                .expect("Failed read");
            self.buf_iter = unsafe {
                let slice = str::from_utf8_unchecked(&self.buf_str);
                std::mem::transmute(slice.split_whitespace())
            }
        }
    }
}