#include<bits/stdc++.h>
using namespace std;
int main(void){
int sum=0;
for(int a=1;a<2;a++){
for(int b=0;b<10;b++){
for(int c=0;c<10;c++){
if((b*6+c)%9==0){
sum++;
}
}
}
}
cout<<sum;
}
I2luY2x1ZGU8Yml0cy9zdGRjKysuaD4KdXNpbmcgbmFtZXNwYWNlIHN0ZDsKaW50IG1haW4odm9pZCl7CiAgaW50IHN1bT0wOwogIGZvcihpbnQgYT0xO2E8MjthKyspewogICAgZm9yKGludCBiPTA7YjwxMDtiKyspewogICAgICBmb3IoaW50IGM9MDtjPDEwO2MrKyl7CiAgICAgICAgaWYoKGIqNitjKSU5PT0wKXsKICAgICAgICAgIHN1bSsrOwogICAgICAgIH0KICAgICAgfQogICAgfQogIH0KICBjb3V0PDxzdW07Cn0=