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#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
#define rep(a,b) for(int a = 0; a < (b); ++a)
#define all(t) t.begin(), t.end()
#define pb push_back
#define fi first
#define se second
#define each(a,x) for(auto &a:x)
#define vi vector<int>
#define vll vector<ll>
#define vull vector<ull>
#define pi pair<int,int>
#define pll pair<ll,ll>
#define nl '\n'
#pragma GCC optimize ("O3")
#pragma GCC optimize ("unroll-loops")
#pragma GCC target("avx2")
#pragma GCC target("bmi")
#pragma GCC target("bmi2")
#pragma GCC target("lzcnt")
#pragma GCC target("popcnt")
const int N = 5e5+1234,INF = 2e9+1234,mod = 1e9+7;
const ll INF_L = (ll)2e18+1234;
void solve()
{
    string A,B,C;cin>>A>>B>>C;int n=(int)A.size();ll ans=0;
    vector<vector<int>> dp;dp.assign(n+1,{});rep(i,n+1) dp[i].assign(2,0);
    for(int i=n-1;i>=0;--i)
    {
        int a=(int)A[i]-48,b=(int)B[i]-48,c=(int)C[i]-48,d=a+b;
        if(d%10==c) dp[i][d>=10]=1;
        if(d%10==c) dp[i][d>=10]+=dp[i+1][0];
        if((d+1)%10==c) dp[i][(d+1)>=10]+=dp[i+1][1];
        ans+=dp[i][0];
    }
    cout << ans << nl;
}
int main()
{ 
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int T=1;
    //cin >> T;
    while(T--) solve();
    return 0;
}