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#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
void solve()
{
    string A,B,C; ll n=0,spr=0,ans=0; vector<ll> suma,k,dp;
    cin>>A>>B>>C; n=(int)A.size();
    for(int i=n-1; i>=0; --i){suma.push_back((int)A[i]+(int)B[i]-96); k.push_back((int)C[i]-48); dp.push_back(0);}
    for(int i=0; i<n; ++i)
    {
        if(suma[i]%10==k[i])++dp[i];
        if(i>0)
        {
            if(suma[i-1]<=8){if(suma[i]%10==k[i]) dp[i]+=dp[i-1];}
            else if(suma[i-1]>=10){if((suma[i]+1)%10==k[i]) dp[i]+=dp[i-1];}
            else
            {
                if(k[i-1]==9){if(suma[i]%10==k[i]) dp[i]+=dp[i-1];}
                else if (k[i-1]==0){if((suma[i]+1)%10==k[i]) dp[i]+=dp[i-1];}
            }
        }
    }
    for(int i=0; i<n; ++i)
    {
        if(i>0)
        {
            if(suma[i]<=8){ans+=dp[i];}
            else if(suma[i]>=10){}
            else
            {
                if(k[i]==9){ans+=dp[i];}
            }
        }
        else if(suma[i]==k[i]) ++ans;
    }
    cout<<ans;
}
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int MAKUMBA=1;
    //cin>>MAKUMBA;
    for(int KOKOJAMBO=0; KOKOJAMBO<MAKUMBA; ++KOKOJAMBO){solve();}
    return 0;
}