function Main(input) {
    'use strict';
    let data = input.split("\n");
    let first_line = data[0].split(" ");
    let second_line = data[1];

    let x = parseInt(first_line[0]);
    let y = parseInt(first_line[1]);

    let z = addCorrect(x+4);
    if (z === y) {
        console.log(addCorrect(z+4));
    } else {
        console.log(z);
    }
}

function addCorrect(num){
    let buf = num + 4;
    if (12 < buf) {
       return buf -= 12;
    } else {
        return buf;
    }
}

// Don't edit this line!
Main(require("fs").readFileSync("/dev/stdin", "utf8"));