1 #include<iostream>
 2 #include<algorithm>
 3 #include<cstdio>
 4 #include<cstdlib>
 5 #include<cmath>
 6 #include<cstring>
 7 using namespace std;
 8 const int INF=0x3f3f3f3f;
 9 typedef long long LL;
10 void e_gcd(LL a,LL b,LL &d,LL &x,LL &y){
11     if(!b){
12         d=a;
13         x=1;y=0;
14     }
15     else{
16         e_gcd(b,a%b,d,x,y);
17         LL temp=x;
18         x=y;
19         y=temp-a/b*y;
20     }
21 }
22 void cal(LL a,LL b){
23     LL d,x,y;
24     e_gcd(a,b,d,x,y);
25     //printf("%lld %lld %lld %lld\n",a,b,x,y);
26     if(d!=1){
27         puts("Inf");
28         return;
29     }
30 /*    if(b<0)b=-b;
31     LL ans=x%b;
32     //printf("%lld\n",x);
33     if(ans<0)ans+=b;
34     if(a<0)a=-a;
35     y%=a;
36     if(y<0)y+=a;
37 //    printf("%lld %lld %lld\n",ans,t,y);
38     printf("%lld\n",max(a*ans-1,b*y-1);*/
39     printf("%lld\n",a*b-a-b);
40 }
41 int main(){
42     LL a,b;
43     while(~scanf("%lld%lld",&a,&b),a|b){
44         cal(a,b);
45     }
46     return 0;
47 }