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#include <bits/stdc++.h>
using namespace std;

#define ll long long
string a, b, c;
int n;
ll ans;

int main(){
	ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
	
	cin >> a >> b >> c;
	
	n = a.size();
	ans = 0;
	
	ll end0 = 0, end1 = 0;
	
	for(int i = 0; i < n; i++){
		int x = a[i] - '0';
		int y = b[i] - '0';
		int z = c[i] - '0';
		
		ll start0 = end0 + 1;//ile poczatkow przedzialow
		ll start1 = end1;
		
		ll nxt0 = 0;//ile w nastepnym poczatkow
		ll nxt1 = 0;
		
		
		if(start0 > 0){
			int nxt = z - x - y;//przenosimy 0
			if(nxt == 0) nxt0 += start0;
			else if(nxt == 1) nxt1 += start0;
		}
		
		if(start1 > 0){
			int nxt = 10 + z - x - y;//przenosimy 1
			if(nxt == 0) nxt0 += start1;
			else if(nxt == 1) nxt1 += start1;
		}
		
		end0 = nxt0;
		end1 = nxt1;
		
		ans += end0;
	}
	
	cout << ans;
}