#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>
#include <ctype.h>
#pragma warning(disable:4996)
typedef long long s64, LL;
typedef unsigned long long u64, ULL;
typedef const void *cvp;
#define MAX(a,b) (((a)>(b))?(a):(b))
int arr[6000010] = { 0 };
int main(){
#ifdef _DEBUG
    FILE *fp = freopen("../../../input.txt", "r", stdin);
    //FILE *fp2 = freopen("../../../output.txt", "w", stdout);
#endif // _DEBUG
    int n, i, ans = 0, ans1;
    scanf("%d", &n);
    for(i = 0; i < n; i++){
        scanf("%d", arr + i);
        ans ^= arr[i];
    }
    if(n & 1){//奇数直接出答案
        printf("%d\n", ans);
    }
    else if(!ans){
        puts("False Alarm.");
    }
    else{
        ans1 = ans;
        int pos = 1, k;
        for(k = 0; k < 32; k++){
            if(ans1 & (1 << k)){
                pos = (1 << k); break;
            }
        }
        for(i = 0; i < n; i++){
            if(arr[i] & pos){
                ans ^= arr[i];
            }
            else{
                ans1 ^= arr[i];
            }
        }
        if(ans < ans1){
            printf("%d %d\n", ans, ans1);
        }
        else{
            printf("%d %d\n", ans1, ans);
        }
    }
#ifdef _DEBUG
    fp = freopen("CON", "r", stdin);
    //fp2 = freopen("CON", "w", stdout);
    system("pause");
#endif // _DEBUG
    return 0;
}