#include<bits/stdc++.h>
using namespace std;
typedef long long int ll;



int main()
{
    string s;
    while(cin>>s)
    {
        ll len=s.size();

       ll i,j,k=0,cnt[len+5],cnt0=0,cnt1=0,cnt2=0,sum=0,a,b,c,d,e,ans=0;
       memset(cnt,0,sizeof(cnt));
       cnt[0]=1;

       for(i=0;i<s.size();i++)
       {
           if(s[i]>='a' && s[i]<='z')
           {
               memset(cnt,0,sizeof(cnt));
               cnt[0]=1;
               sum=0;
           }
           else
           {
               sum=sum+(s[i]-'0');
               sum%=3;
               ans+=cnt[sum];
               cnt[sum]++;
           }
       }
       cout<<ans<<endl;
    }
    return 0;
}