#include <iostream>
#include <string>
using namespace std;int main(){ios::sync_with_stdio(0);cin.tie(0);string a,b,c;cin>>a>>b>>c;int n=a.size();long long w=0,l=0;bool p=0;int q=0;for(int j=0;j<n;++j){int x=a[j]-'0',y=b[j]-'0',z=c[j]-'0',s=x+y,t=0,u=0;bool v=1;if(z==s%10)u=s>=10;else if(z==(s+1)%10)t=1,u=s>=9;else v=0;if(!v){l=0;p=0;continue;}if(!j||!p||q!=u)l=0;if(!u)++l;if(!t)w+=l;p=1;q=t;}cout<<w<<'\n';}