#include #define rep(i,n) for(int i = 0; i < (n); ++i) #define srep(i,s,t) for (int i = s; i < t; ++i) #define drep(i,n) for(int i = (n)-1; i >= 0; --i) using namespace std; typedef long long int ll; typedef pair P; #define yn {puts("Yes");}else{puts("No");} #define MAX_N 200005 int main() { int a, b; cin >> a >> b; int ans = 3; srep(i,a,b+1){ if(i == 23)ans--; if(i == 24)ans--; if(i == 25)ans--; } cout << ans << endl; return 0; }