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