#include"bits/stdc++.h" using namespace std; int main(){ int a,b,c,ans=0,d,e,f,g,h,m,n; cin>>m>>n; for(int i=m;i<=n;i++){ a=i/10000000; b=i/10000000%10; c=i/1000000%10; d=i/100000%10; e=i/10000%10; f=i/1000%10; g=i/100%10; h=i/10%10; if(g*10+h<=31&&e*10+f<=12&&a==h&&b==g&&c==f&&d==e)ans++; } cout<<ans;}