#include<bits/stdc++.h>
using namespace std;
#define ll long long

int main()
{
    ll n,m;  cin>>n>>m;
    vector<ll>a(n),b(m);

    map<ll,ll>mp;

    for(auto &it : a)
    {
        cin>>it;
        mp[it]++;
    }
     for(auto &it : b)
    {
        cin>>it;
        mp[it]++;
    }
    for(auto i : mp)
    {
        if(i.second ==1) cout<<i.first<<" ";
    }
    cout<<endl;
}
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

#define ll long long
#define ull unsigned long long
#define ld long double
#define F first
#define S second
#define eb emplace_back
#define pb push_back
#define mp make_pair
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)

using namespace __gnu_pbds;
using namespace std;

template <typename T> using oset = tree <pair <T, T>, null_type, less <pair <T, T>>, rb_tree_tag, tree_order_statistics_node_update>;

template <typename T>
void ckmin(T& a, const T b) {a = min(a, b);}

template <typename T>
void ckmax(T& a, const T b) {a = max(a, b);}

template <typename T>
void print(vector <T> v) {
    for (T i : v) cout << i << " ";
    cout << '\n';
}

template <typename T>
void print(vector <vector <T>>& v) {
    for (vector <T>& vv : v) {
        for (T& i : vv)
            cout << i << " ";
        cout << '\n';
    }
}

template <typename T>
void read(vector <T>& v) {for (T& i : v) cin >> i;}

template <typename T>
void read(T&& t) {cin >> t;}

template <typename T, typename... Args>
void read(T&& t, Args&&... args)
{
    cin >> t;
    read(forward<Args>(args)...);
}

template <typename T>
void print(T&& t) {cout << t << '\n';}

template <typename T, typename... Args>
void print(T&& t, Args&&... args)
{
    cout << t << " ";
    print(forward<Args>(args)...);
}

void usaco(string name = "")
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    if(name.size())
    {
        freopen((name+".in").c_str(), "r", stdin);
        freopen((name+".txt").c_str(), "w", stdout);
    }
}

void solve()
{
    ll a, b;
    cin >> a >> b;
    print(2*a+100-b);
}

int32_t main()
{
    usaco();
    int t = 1;
    while (t--) solve();
}
