#include<iostream> using namespace std; int main(){ int n,m; cin>>n>>m; int g=n/1%10; int s=n/10%10; int a=m/1%10; int b=m/10%10; if(n==m){ cout<<"100"; }else if(g==b&&s==a){ cout<<"20"; }else if(g==b||s==a){ cout<<"2"; } return 0; }