problema 1411

#include <iostream>
using namespace std;
int main()
{
    int a,b,c=0,x,y;
    while (a!=0 && b!=0){
        cin>>a>>b;
        while (a>9){
            a=a/10;
        }
        x=a;
        while (b>9){
            b=b/10;
        }
        y=b;
        if (y==x)
            c++;
    }
cout<<c-1;
}