#include <bits/stdc++.h>
using namespace std;

int main(){
    int i, months = 12, a, b, count=0;
    for(i=1; i< months; i++){
        for(a=0; a<= 3; a++){
            b = i-a;
            if ( (b < 10 and b >= 0) \
            and (( (i==1 or i==3 or i==5 or i==7 or i==8 or i==10 or i==12) and a*10+b <=31 )  \
            or (i==2 and a*10+b <=28 ) \
            or ( (i==4 or i==6 or i==9 or i==11) and a*10+b <=30 ))){
                    count++;
            }
        }
    }
    
    cout << count << endl;
    return 0;
}