#include<iostream> using namespace std; int main() { int jz=9,cnt=0,n,m; cin>>n>>m; for(int i=n;i<=m;i++){ int x=i,a9=0,b9,p=1; bool f=true; while(x){ if(x%jz%2==0){ f=false; break; } a9=a9*10+x%jz; b9=b9+x%jz*p; p=p*10; x/=jz; } if(a9==b9&&f){ cnt++; } } cout<<cnt; return 0; }