function Main(input) {
    let src = input.replace("\n", "").split(" ");
    let x = parseInt(src[0]);
    let y = parseInt(src[1]);
    const c = [
        [0, 4, 8],
        [1, 5, 9],
        [2, 6, 10],
        [3, 7, 11]
    ];
    let t = -1;
    for (let i = 0; i <= 3; i++) {
        if (c[i].includes(x)) {
            t = i;
            break;
        }
    }
    let ans = [...c[t]];
    ans = [...ans.filter(n => n != x && n != y)];
    console.log(ans[0]);
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));
// 愚直