subarr

const n = +gets();
let numbersN = gets().split(' ').map(Number).sort((a, b) => a - b);
const m = +gets();
let numbersM = gets().split(' ').map(Number).sort((a, b) => a - b);

const arrUnique = [];
const arr2 = [];

for(const number of numbersN){
    if(numbersM.includes(number)){
        if(!arr2.includes(number)){
            arr2.push(number);
        }
    } else{
        if(!arrUnique.includes(number)){
            arrUnique.push(number);
        }
    }
}

if(arrUnique.length > 0){
    print(arrUnique.join(' '));
} else {
    if(arr2.length > arrUnique){
        print(arr2.length);
    } else {
        print(arrUnique.join(' '));
    }
}