#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>
#include <ctype.h>
#include <time.h>
#pragma warning(disable:4996)
typedef long long LL;
typedef unsigned long long ULL;
char s1[114514] = { 0 }, s2[114514] = { 0 };
int main(){
    int m, n, i, j, flag1 = 0, flag2 = 0;
    int count1[30] = { 0 }, count2[30] = { 0 };
    scanf("%s%s", s1, s2);
    m = strlen(s1);
    n = strlen(s2);
    if(m > n){
        puts("Single Forever!");
    }
    else{//m<n
        for(i = 0; i < m; i++){
            count1[s1[i] - 'a'] += 1;
            count2[s2[i] - 'a'] += 1;
        }
        flag1 = 1;
        for(i = 0; i < 26; i++){
            if(count1[i] != count2[i]){
                flag1 = 0;
                break;
            }
        }
        if(flag1){
            puts("65472");
        }
        else{
            for(j = m; j < n; j++){
                count2[s2[j - m] - 'a'] -= 1;
                count2[s2[j] - 'a'] += 1;
                flag1 = 1;
                if(flag2){
                    break;
                }
                for(i = 0; i < 26; i++){
                    if(count1[i] != count2[i]){
                        flag1 = 0;
                        break;
                    }
                }
                if(flag1){
                    flag2 = 1;
                }
            }
            if(flag2){
                puts("65472");
            }
            else{
                puts("Single Forever!");
            }
        }
    }
    return 0;
}