#include <iostream>

using namespace std;

int main()
{
    long long a,b,ca,cb,nrcifa,nrcifb,i,j,n1,n2,cn1,cn2,C=0,p1,p2,inv1,inv2;
    cin>>a>>b;
    while(a!=0&&b!=0 )
    {

        ca=a;
        cb=b;
        nrcifa=0;
        while(ca!=0)
        {
            ca=ca/10;
            nrcifa++;
        }
        p1=1;
        for(i=1; i<=nrcifa; ++i)
        {
            p1=p1*10;
        }
        n1=b*p1+a;
        cn1=n1;
        inv1=0;
        while(cn1!=0)
        {
            inv1=inv1*10+cn1%10;
            cn1=cn1/10;
        }
        if(inv1==n1)
        {
            C++;
        }

        else
        {
            nrcifb=0;
            while(cb!=0)
            {
                cb=cb/10;
                nrcifb++;
            }
            p2=1;
            for(j=1; j<=nrcifb; ++j)
            {
                p2=p2*10;
            }
            n2=a*p2+b;
            cn2=n2;
            inv2=0;
            while(cn2!=0)
            {
                inv2=inv2*10+cn2%10;
                cn2=cn2/10;
            }
            if(inv2==n2)
            {
                C++;
            }
        }
        cin>>a>>b;

    }
    cout<<C;
    return 0;
}